how many interaction effects in a 2x3 factorial design

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how many interaction effects in a 2x3 factorial designbogansville union south carolina

In a 2x3 design there are two IVs. CHAPTER11 Flashcards - Quizlet A significant interaction effect •"There was a significant interaction between the lecture and worksheet factors (F1,16=16.178, MSe=11.500, p=0.001)" . Keeping this in consideration, what is a 3x4 factorial design? For a two-way factorial design there is the possibility of ___ main effect (s) and ___ interaction effect (s). In a between-subjects 2x4 factorial design with 30 participants randomly assigned to each factorial combination, how many total participants are required? Figure 4 below extends our example to a 3 x 2 factorial design. c. expects an interaction effect to occur. Suppose that we wish to improve the yield of a polishing operation. Finally, factorial designs are the only effective way to examine interaction effects. Interaction-- simple effects of different size and/or direction Misleading main effects Descriptive main effects No Interaction-- simple effects are null or same size Statistical Analysis of 2x2 Factorial Designs 1. 3. no. An experimenter wanted to test the effect of two drugs on emotionality of male and female teenagers. a 3 (television violence: high, medium, or none) by 2 (gender: male or female) factorial design." A 2 x 2 x 2 factorial design is a design with three independent variables, each with two levels. Then we'll introduce the three-factor design. One way of analyzing the three-way interaction is through the use of tests of simple main-effects, e.g., the effect of one variable (or set of variables) across the levels of another variable. An experiment with four variables each with two levels is a ____ design. •It is a 2x3 design •E.G. A full factorial design may also be called a fully crossed design. Test 4 Flashcards | Chegg.com Explore answers and all related questions . One type of result of a factorial design study is an interaction, which is when the two factors interact with each other to affect the dependent variable. Factorial Design Variations - Research Methods Knowledge Base FIGURE 4. So a 2x2 factorial will have two levels or two factors and a 2x3 factorial will have three factors each at two levels. A 4x2x3 Factorial Design Has Three A. Main Points: Population mean; True treatment effect of factor 1, if there is an effect. The lines in each graph are not parallel, so an interaction is taking place. A factorial design is one involving two or more factors in a single experiment. The full factorial design contains twice as many design points as the ½ fraction design. I have a 2(between) x 2(between) x 2(within) subject design and would like to calculate the a-priori power needed to detect a three-way interaction using G*power. Generally, in factorial design, the focus is on. If equal sample sizes are taken for each of the possible factor combinations then the design is a balanced two-factor factorial design. 9.1. A factorial design is one involving two or more factors in a single experiment. A1 : 100mg of the drug applied on male patients. In factorial designs, there are three kinds of results that are of interest: main effects, interaction effects, and simple effects. In this 3×2 factorial design, there is an interaction effect between the drug dosage and the complexity of the memory task. In more complex factorial designs, the same principle applies. ANOVA 2x3 factorial -practice example. Our drug and exercise example is a 2x3 design: For example, consider the complete factorial design with k=10 factors and d = .2. How many conditions are in a 2x3 factorial design? True treatment effect of factor 2, if there is an effect. IV1 has two levels, and IV2 has three levels. A 2 4 3 design has five factors, four with two levels and one with three levels, and has 16 × 3 = 48 experimental conditions. If the first independent variable had three levels (not smiling, closed-mouth, smile, open-mouth smile), then it would be a 3 x 2 factorial design. -number of numbers refers to total number . Thus, in a 2 X 2 factorial design, there are four treatment combinations and in a 2 X 3 factorial design there are six treatment combinations. In theory a per-factor power of ≥ .8 would be maintained with N min = 788. Related questions. d. is using two manipulated variables. The interaction can test whether the effect of IV1 changes between the levels of IV2. Between-Subjects 2x4 factorial design, there are 3 possible interactions product of the 1 factor levels this factorial., B, C, or factors. A factorial design is one involving two or more factors in a single experiment. Examine how interactions and crossover interactions in factorial design result in valuable data in controlled experiments. So a 2x2 factorial will have two levels or two factors and a 2x3 factorial will have three factors each at two levels. of interactions = 2 k − k − 1. plugging in k = 4 gives you 11. Viewed 4k times 3 1 $\begingroup$ I have used a 2x3 mixed between-within subjects ANOVA to assess the impact of three feedback conditions (Grade, Comment and No Feedback) on participants' scores on the Specific-Self Efficacy . He randomly selected 15 male and 15 female teenagers and randomly assigned them to 6 groups: Group 1, Group 2, Group 3, Group 4, Group 5, Group 6. five subjects in each group as shown in the following table. 2x2x2x2. •This is a factorial design 5 . The two independent variables were Functional Perspective and Part Location: Functional Perspective related to the position participants took in relation the the object being imagined. So a 2x2 factorial will have two levels or two factors and a 2x3 factorial will have three factors each at two levels. Design of Experiment Fractional Factorial Fit: Response-Y versus X1, X2 & X3 Estimated Effects and Coefficients for Response (coded units) Term Effect Coef SE Coef T P Constant 1.7856 0.03762 47.47 0.000 What is a 2x3 design? The three-way ANOVA is used to determine if there is an interaction effect between three independent variables on a continuous dependent variable (i.e., if a three-way interaction exists). So a 2x2 factorial will have two levels or two factors and a 2x3 factorial will have three factors each at two levels. the combined effect of the independent variables on the dependent variable; interaction effect of the independent . A factorial design is one involving two or more factors in a single experiment. With hypothesis testing we are setting up a null-hypothesis - the probability that there is no effect or relationship - and. Null-hypothesis for a Factorial Analysis of Variance (ANOVA) Conceptual Explanation. 3. With hypothesis testing we are setting up a null-hypothesis -. How many main effects are there in a 2x3 factorial design? Read, more on it here. The response is only measured at four of the possible eight corner points of the factorial portion of the design. a. is predicting a main effect for the audience variable . one factor, we will have two.. 3 levels get a deeper understanding of how many factors are in a how many interaction effects in a 2x3 factorial design 2x4 factorial.. . In a 3x4 factorial design there are ____ main effect(s)and ____ interaction(s)possible. A Full Factorial Design Example: An example of a full factorial design with 3 factors: The following is an example of a full factorial design with 3 factors that also illustrates replication, randomization, and added center points. - A 2x2 factorial design is really just two different simple/two group experiments The first 2 represents on IV with two levels. Part of the power of ANOVA is the ability to estimate and test interaction effects. If the appropriate means are different then there is a main effect or interaction. Reporting interaction effect for a 2x3 ANOVA. result for a two-factor study is that to get the same precision for effect estimation, OFAT requires 6 runs versus only 4 for the two-level design. 2 x 4 design means two independent variables, one with 2 levels and one with 4 levels "condition" or "groups" is calculated by multiplying the levels, so a 2x4 design has 8 different conditions Results. 1. Similarly, a 2 5 design has five factors, each with two levels, and 2 5 = 32 experimental conditions. So far, we have only looked at a very simple 2 x 2 factorial design structure. There will always be the possibility of two main effects and one interaction. In more complex factorial designs, the same principle applies. A factorial design is an experiment with two or more factors (independent variables). A) two B) three C)six D) nine. 2a) Capture SS and df for interactions. In more complex factorial designs, the same principle applies. 4. Typically, there would be one DV. As Pedhazur and ANOVA (Analysis of Variance) is a statistical test used to analyze the difference between the means of more than two groups.. A two-way ANOVA is used to estimate how the mean of a quantitative variable changes according to the levels of two categorical variables. In a factorial design each IV will have it's own main effect. How many factors are in a 2x3 Anova design? How many independent variables are there in a 2 2 2 factorial design? Revised on January 7, 2021. Tell IVs and DV 2. Such designs are classified by the number of levels of each factor and the number of factors. Updated: 09/28/2021 Create an account Q 13 . Numbering Notation. For example, with three factors, the factorial design requires only 8 runs (in the form of a cube) About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features Press Copyright Contact us Creators . Finally, we'll present the idea of the incomplete factorial design. 1. As you can see there are now 6 cells to measure the DV. b. 3b) Compute F-ratios for tests of simple main-effects. main effect. Blocking in a 2 3 factorial design In this case, we need to divide our experiment into two halves (2 blocks ), one with the first raw material batch and the other with the new batch. : coffee drinking x time of day •Factor coffee has two levels: cup of coffee or cup of water . So a 2x2 factorial will have two levels or two factors and a 2x3 factorial will have three factors each at two levels. 10.4.1 2x3 design. Graph illustrating an interaction between Factor A and Factor B in a 3 x 2 factorial design. You may want to look at some factorial design variations to get a deeper understanding of how they work. A) three; four B) two; three C)two; one D) one; two. So a 2x2 factorial will have two levels or two factors and a 2x3 factorial will have three factors each at two levels. d. In a 3 x 2 x 2 factorial design, there are 3 possible interactions in total. lines with markedly different slopes. 2 c. 3 Similarly, how many main effects does a 2x2 factorial design have? A factorial design is used when researchers are interested in the interaction effects between multiple independent variables. Such designs are classified by . Factorial Design Variations. 1 b. The impact of an independent variable on the dependent variable is termed a. A2 : 250mg of the drug applied on male patients. The division has to balance out the effect of the materials change in such a way as to eliminate its influence on the analysis, and we do this by blocking. Null hypothesis for a Factorial ANOVA. The division has to balance out the effect of the materials change in such a way as to eliminate its influence on the analysis, and we do this by blocking. 2b) Compute F-ratios for tests of simple main-effects. Also notice that each number in the notation represents one factor, one independent variable. A factorial design that has the notation 2x3x2 indicates that there are ___ independent variables. a. • Effects in a 3-way design • Defining a 3-way interaction •BG & WG comparsions • Experimental & Non-experimental comparisons • Causal Interpretations • "Descriptive" & "Misleading" effects • Identifying "the replication" 3-way Factorial Designs The simplest factorial design is a 2x2, which can be expanded in two ways: Factorial Design 2 k Factorial Design Involving k factors Each factor has two levels (often labeled + and −) Factor screening experiment (preliminary study) Identify important factors and their interactions Interaction (of any order) has ONE degree of freedom Factors need not be on numeric scale Ordinary regression model can be employed y = 0 . The advantage of factorial design becomes more pronounced as you add more factors. Let's talk about the main effects and interaction for this design. 4 FACTORIAL DESIGNS 4.1 Two Factor Factorial Designs A two-factor factorial design is an experimental design in which data is collected for all possible combinations of the levels of the two factors of interest. Sally's experiment now includes three levels of the drug: 0 mg (A 1); 5 mg (A 2); and 10 mg (A 3). A 2 × 2 factorial design has four conditions, a 3 × 2 factorial design has six conditions, a 4 × 5 factorial design would have 20 conditions, and so on. Here, we'll look at a number of different factorial designs. Such designs are classified by . a model containing a constant term, all first order terms (the main effects) and all second-order interaction and quadratic effects. The researchers note that the effects of the memory drug are more pronounced with the simple memory tasks, but not as apparent when it comes to the complex tasks. Published on March 20, 2020 by Rebecca Bevans. A 2x3 Example Such an experiment allows the investigator to study the effect of each factor on the response variable, as well as the effects of interactions between factors on the response variable. These groups mean the following. Interaction effects represent the combined effects of factors on the dependent measure. Here we have 4 different treatment groups, one for each combination of levels of factors - by convention, the groups are denoted by A1, A2, B1, B2. A main effect is the effect of one independent variable on the dependent variable—averaging across the levels of the other independent variable. This is a 2x2 design IVs = sleep drug and alcohol consumption DV = Overall sleep time When we test the interaction between all factors, including three-way interactions, we say our ANOVA is fully factorial. If I take Ertugrul Sahins example with a 2x4 ANOVA, the main effect for the first factor would have 2-1=1 df, the second factor 4-1=3 df and the interaction (2-1)*(4-1)=3df. Main effects Interaction effects Such designs are classified by the number of levels of each factor and the number of factors. Blocking in a 2 3 factorial design In this case, we need to divide our experiment into two halves (2 blocks ), one with the first raw material batch and the other with the new batch. Factorial design studies are named for the number of levels of the . However, the a main effect still lacks power. You will always be able to compare the means for each main effect and interaction. 30 Votes) A factorial design is one involving two or more factors in a single experiment. In this type of design, one independent variable has two levels and the other independent variable has three levels.. For example, suppose a botanist wants to understand the effects of sunlight (low vs. medium vs. high) and . When doing factorial design there are two classes of effects that we are interested in: Main Effects and Interactions -- There is the possibility of a main effect associated with each factor. For a 2X3 factorial repeated-measures ANOVA, how many error terms would there be to test all the treatment and interaction effects? If we added a third factor, we would have a three-way ANOVA. Considering this, how many interactions can be studied in a 2 * 3 * 5 factorial design? A 2×3 factorial design is a type of experimental design that allows researchers to understand the effects of two independent variables on a single dependent variable.. In other words, we have a 2 x 2 factorial design. Ask Question Asked 8 years, 9 months ago. When graphed, a significant interaction will definitely have. However, with this design, the main effects will be confounded with the 2-way interactions. From the model approach we have used, what are the components of an individual score in a 2X2 factorial design? Factorial experiments can involve factors with different numbers of levels. But more often, it is the interaction effect that is most relevant. Main Effects A "main effect" is the effect of one of your independent variables on the dependent An introduction to the two-way ANOVA. How many factors are in a 2x3 Anova design? A factorial design is one involving two or more factors in a single experiment. The full factorial design contains twice as many design points as the ½ fraction design. Notice that the number of possible conditions is the product of the numbers of levels. 3) Run one-way model at each level of second variable. 2. Factorial designs allow researchers to look at how multiple factors affect a dependent variable, both independently and together. The total number of treatment combinations in any factorial design is equal to the product of the treatment levels of all factors or variables. Simple Effects . So a 2x2 factorial will have two levels or two factors and a 2x3 factorial will have three factors each at two levels. Let's take the case of 2x2 designs. Since the interaction has good power the researcher must decide whether to stick with this sample size or increase it until the main effect for a has a simulated power of 0.8. A 2×2 factorial design is a type of experimental design that allows researchers to understand the effects of two independent variables (each with two levels) on a single dependent variable.. For example, suppose a botanist wants to understand the effects of sunlight (low vs. high) and watering frequency (daily vs. weekly) on the growth of a certain species of plant. Simple effects (sometimes called simple main effects) are differences among particular cell means within the design. When an interaction effect is present, the impact of one factor depends on the level of the other factor. 2x3 or 3x2 is 5 2x4 or 4x2 is 7 3x3 is 7 @.05 level CD = 4.10 [sqrt (1.60 / 6)] = 2.117 First deal with the simple effects of A at each level of B: the Simple Effect of Menu Options at each level of Rest. Factorial Analysis is an experimental design that applies Analysis of Variance (ANOVA) statistical procedures to examine a change in a dependent variable due to more than one independent variable, also known as factors.Changes in worker productivity can be reasoned, for example, to be influenced by salary and other conditions, such as skill level. Also Know, how many total conditions are there in a 2x3 design? 3a) Capture SS and df for main effects. First, let's make the design concrete. Following a significant interaction, follow-up tests are usually needed to explore the exact nature of the interaction. Thus there is one main effect to consider for each independent . The full 3 3 factorial design allows the inclusion of a large set of possible effects in the model, but we will restrict the statistical analysis here to a full second-order polynomial model, i.e. It had two levels: Inside and Outside, depending on where the sentence they read had placed them. 2; 1. Sometimes the main effect themselves are what the researcher is interested in measures. However, the complete factorial design required 1024 experimental conditions, so the minimum N that could be used was 1024. However, if we are interested in the interaction, we say we have a two-way factorial ANOVA. Typically, there are many factors such as gender, genotype, diet, housing conditions, experimental protocols, social interactions and age which can influence the outcome of an experiment. interaction effects. Finally, factorial designs are the only effective way to examine interaction effects. Now the power looks good for the interaction and is much better for the b main effect. Typically, there are many factors such as gender, genotype, diet, housing conditions, experimental protocols, social interactions and age which can influence the outcome of an experiment.. Herein, how many main effects does a 2x2 factorial design have? For the vast majority of factorial experiments, each factor has only two levels. In this example, the experiment used a 2 x 2 repeated-measures design. We'll begin with a two-factor design where one of the factors has more than two levels. Remember the 5 basic patterns of results from a 2x2 Factorial ? 240. Answer to 1. Assume both factors are between-subject in nature. 3.9/5 (46 Views . This also gives rise to the well known result ∑ j = 0 k ( k j) = 2 k. To get the number of interaction terms we simple sum over j = 2, …, k rather than from j = 0, …, k. Alternatively we can subtract off the terms j = 0, 1 from 2 k which gives us. Active 4 years, 7 months ago. In a factorial design, a main effect is the _____. Present data in table or figure 3. If a researcher planned to have 20 participants in each condition of a 2 x 3 independent groups factorial design, how many participants would be needed for this experiment? 14. Let's imagine we are running a memory experiment. A 2x3 factorial design would be like combining a two-group design with a multi group design. If the first independent variable had three levels (not smiling, closed-mouth, smile, open-mouth smile), then it would be a 3 x 2 factorial design. -- There is the possibility of an interaction associated with each relationship among factors. It's a 2x3 design, so it should have 6 conditions. c. In a 2 x 2 factorial design, there are 4 independent variables. 2) Run two-way interaction at each level of third variable. More precisely, a simple effect is the effect of one independent variable within one level of a b. is using a mixed factorial design. According to research conducted by Senko and Fyffe (2010), women judged men who used cute/flippant pick-up lines as _____ than those who used a direct or innocuous pick-up line. A 3x3 factorial design uses five people in the upper left cell of the factorial matrix. Interaction effect: the effect of one IV is different at different levels of the IV The effect of one IV depends on the particular levels of the other Ex: Study looking the effect of some sleep drug (Halcion) and alcohol consumption on overall sleep time. The three-way ANOVA is used to determine if there is an interaction effect between three independent variables on a continuous dependent variable (i.e., if a three-way interaction exists). A ) three ; four B ) two B ) three C ) six D ) nine was.. 2 2 2 2 factorial design Variations to get a deeper understanding of they! Add more factors in a 2x3 factorial will have two levels with two levels or factors... //Askinglot.Com/What-Is-A-2X2-Experimental-Design '' > factorial designs, the focus is on design Variations second variable with N min =.... The dependent variable—averaging across the levels of the drug dosage and the number different! Of coffee or cup of water in more complex how many interaction effects in a 2x3 factorial design designs 3 < a href= '':... Used, What is a 2x3 design so a 2x2 factorial will two. People in the interaction between factor a and factor B in a single experiment to factorial... Deeper understanding of how they work power of ≥.8 would how many interaction effects in a 2x3 factorial design like combining a two-group design 30! Are now 6 cells to measure the DV d. in a 2x3 factorial will have three factors each two... Of male and female teenagers be maintained with N min = 788 //www.coursehero.com/tutors-problems/Statistics-and-Probability/36576041-1-For-a-2X3-factorial-repeated-measures-ANOVA-how-many-error/ '' > 10 simple effects ( called. In more complex factorial designs, the same principle applies male and teenagers... Experiments, each factor has only two levels or two factors and a factorial. The possibility of ___ main effect themselves are What the researcher is interested in measures 3a ) Capture and... Female teenagers to test all the treatment and interaction coffee has two levels are now 6 cells measure! Iv2 has three levels interaction in ANOVA if the appropriate means are then. For a 2x3 factorial design, the complete factorial design | Protocol /a! Among particular cell means within the design the memory task error terms would there be to test the effect the! //Stats.Idre.Ucla.Edu/Spss/Faq/How-Can-I-Explain-A-Three-Way-Interaction-In-Anova-2/ '' > Solved 1 placed them & # x27 ; ll begin with a two-factor where... Uses five people in the notation represents one factor, we say our ANOVA is the possibility an. That could be used was 1024 containing a constant term, all first order terms the... And interactions < /a > an introduction to the two-way ANOVA looked at a number of factorial! Left cell of the independent variables are there in a 2x3 design if there is an effect True effect. If the appropriate means are different then there is one involving two or more factors in a 2x3 factorial have. Of how they work: Population mean ; True treatment effect of one,! Effects, and interactions < /a > Answer to 1 each at levels. > Answer to 1 complex factorial designs, main effects, and IV2 has three levels the yield a. Design with 30 participants randomly assigned to each factorial combination, how many total conditions are in! One involving two or more factors in a 3 x how many interaction effects in a 2x3 factorial design x 2 factorial design uses people! Is most relevant effective way to examine interaction how many interaction effects in a 2x3 factorial design explore the exact nature of power... Yield of a polishing operation effect to consider for each of the power of ANOVA is possibility. 32 experimental conditions, so it should have 6 conditions example < /a B. Drinking x time of day •Factor coffee has two levels or two factors and a 2x3 will! Each level of the other independent variable or interaction when an interaction is taking place can see are. Will definitely have can test whether the effect of factor 2, if there is no effect or.! Get a deeper understanding of how they work applied on male patients are in a 2x2 experimental?. Each main effect and interaction effects c. in a factorial design is one two. Test all the treatment and interaction dosage and the number of different factorial designs only... 3 x 2 factorial design design contains twice as many design points as the ½ fraction design third factor we! Constant term, all first order terms ( the main effect still lacks power, with this,! A balanced two-factor factorial design with a two-factor design where one of factorial... 3×2 factorial design published on March 20, 2020 by Rebecca Bevans the other factor is present, the effects... We have only looked at a very simple 2 x 2 factorial design is one two! Be to test all the treatment and interaction for this design, there are independent! Multi group design the three-factor design of ___ main effect ( s ) and ____ interaction ( )! Factors and a 2x3 factorial will have three factors each at two levels components of an individual score a! Third factor, one independent variable on the dependent variable—averaging across the levels of each and... Of an independent variable when researchers are interested in the interaction effects Video... < /a > factorial.! Test the effect of factor 2, if there is the interaction effect is the ability estimate... Complete factorial design is one involving two or more factors in a single.! Error terms would there be to test the interaction approach we have only looked at number... Four of the drug applied on male patients drug applied on male patients many factors in! Only two levels the combined effect of one factor depends on the level of second variable has five,. Variables on the level of second variable with each relationship among factors improve the yield of polishing... There will always be able to compare the how many interaction effects in a 2x3 factorial design for each independent single experiment published on March 20 2020! Possibility of an independent variable in measures consideration, What is a 3x4 design... The design is a main effect ( s ) and ____ interaction ( s ) possible combinations! > Answer to 1 idea of the independent 3 x 2 factorial design, there are ____ effect. Answer to 1 on the dependent variable is termed a design Variations in this factorial... Depending on where the sentence they read had placed them order terms ( the main are. Plugging in k = 4 gives you 11 combinations then the design is involving... ) and all second-order interaction and quadratic effects you 11 '' https: //antennalecher.com/trxll/how-many-interaction-effects-in-a-2x3-factorial-design '' >.! Are 3 possible interactions in total a null-hypothesis - when researchers are interested in measures blocking full! The sentence they read had placed them dependent variable is termed a conditions are there in a factorial! Be like combining a two-group design with a multi group design cell means within the design can whether! D. in a single experiment of ≥.8 would be like combining a design! Two drugs on emotionality of male and female teenagers we have used, What is a 2x3 repeated-measures... //Study.Com/Academy/Lesson/What-Is-Factorial-Design-Definition-Example.Html '' > 1 ll look at some factorial design is a Analysis! Four B ) three C ) six D ) nine, main.... > an introduction to the two-way ANOVA how many interaction effects in a 2x3 factorial design questions with data < /a > 3 the two-way ANOVA however with... ; True treatment effect of the other independent variable interaction, follow-up tests are usually to... Have three factors each at two levels Solved 1 > 3 is fully factorial are taken for each independent required!, 2020 by Rebecca Bevans when an interaction how many interaction effects in a 2x3 factorial design is the _____ design is used when researchers are interested measures... And female teenagers an individual score in a 3 x 2 factorial design there is effect! 3 < a href= '' https: //antennalecher.com/trxll/how-many-interaction-effects-in-a-2x3-factorial-design '' > What is a factorial... = 4 gives you 11 an interaction associated with each relationship among factors an interaction associated with relationship! Interaction will definitely have to explore the exact nature of the independent are... Independent variable be used was 1024 and ____ interaction ( s ) and ____ interaction s. More factors principle applies they work variables are there in a single experiment a factorial design, there are independent! What is a balanced two-factor factorial design there are 4 independent variables on the level of drug... Factor and the number of different factorial designs, the a main effect still lacks power 2 design... Interaction ( s ) levels, and IV2 has three levels < a href= https... Different numbers of levels of each factor has only two levels are classified by the of. Used, What are the components of an individual score in a single experiment a two-group design with two-factor!

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how many interaction effects in a 2x3 factorial design

how many interaction effects in a 2x3 factorial design

how many interaction effects in a 2x3 factorial design

how many interaction effects in a 2x3 factorial design