Question

Here are some means for four conditions in a 2x2 Design: IV1 Level 1 Level 2...

Here are some means for four conditions in a 2x2 Design:

IV1
Level 1 Level 2
IV 2 Level 1 100 200
Level 2 200 500

Your task is to:

A. Compute the mean difference for the main effect of IV1

B. Compute the mean difference for the main effect of IV2

C. Compute the mean difference for the interaction

Math   Statistics-And-Probability   
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Homework Answers

Answer #1

A.

Mean for Level 1 IV1 = (100 + 200) / 2 = 150

Mean for Level 2 IV1 = (200 + 500) / 2 = 350

Mean difference for the main effect of IV1 = 350 - 150 = 200

B.

Mean for Level 1 IV2 = (100 + 200) / 2 = 150

Mean for Level 2 IV2 = (200 + 500) / 2 = 350

Mean difference for the main effect of IV2 = 350 - 150 = 200

C.

Difference of IV2 Level 1 and Level 2 for Level 1 IV1 = 200 - 100 = 100

Difference of IV2 Level 1 and Level 2 for Level 2 IV1 = 500 - 200 = 300

Mean difference for the interaction = (300 + 100) / 2 = 200

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