How many interactions does a 2×4 factorial design have?

The total number of treatment combinations in any factorial design is equal to the product of the treatment levels of all factors or variables. 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.

How do you interpret a factorial ANOVA?

Interpret the key results for Two-way ANOVA

  1. Step 1: Determine whether the main effects and interaction effect are statistically significant.
  2. Step 2: Assess the means.
  3. Step 3: Determine how well the model fits your data.
  4. Step 4: Determine whether your model meets the assumptions of the analysis.

What is df1 and df2?

df1=number of treatment levels – 1. df2=number of observations – number of groups. Variation between. Variation within.

How many interactions does a 2x2x2 design have?

1 interaction
For a 2×2 design there is only 1 interaction. The interaction between IV1 and IV2. This occurs when the effect of say IV2 (whether there is a difference between the levels of IV2) changes across the levels of IV1.

What are the assumptions of a factorial ANOVA?

The factorial ANOVA has a several assumptions that need to be fulfilled – (1) interval data of the dependent variable, (2) normality, (3) homoscedasticity, and (4) no multicollinearity.

What is a 3×4 design?

In this notation, the number of numbers tells you how many factors there are and the number values tell you how many levels. If I said I had a 3 x 4 factorial design, you would know that I had 2 factors and that one factor had 3 levels while the other had 4.

How do you find DF1 and df2?

The formula for df1 is the following: d f 1 = g − 1 where g is the amount of groups. The formula for df2 is the following: d f 2 = N − g where N is the sample size of all groups combined and g is the number of groups.

What does DF1 mean?

DF1

Acronym Definition
DF1 Dominant Follicle 1

How many main effects are in a 2×3 factorial design?

9.1.3 2 x 3 designs It’s a 2×3 design, so it should have 6 conditions. As you can see there are now 6 cells to measure the DV.