A student is trying to determine whether an interaction effect is present in an experiment with a 2 × 2 design.The data are summarized in a table.Which of the following methods should the student use to determine whether or not an interaction effect is present?
A)addition method
B)subtraction method
C)multiplication method
D)division method

Question

Quizplus · Accepted Answer

The subtraction method is used to determine interaction effects in a 2 × 2 design by comparing the differences between the levels of one factor across the levels of the other factor.

A Student Is Trying to Determine Whether an Interaction Effect