In the same study as described in Question 3, Gilbert randomly selected 25 classes from the four sampled schools. All selected classes participated in a program that aimed to increase attendance rate (the remaining classes were controls). Gilbert then collected data on the change of attendance rate to see whether the program made a difference. Which ANOVA model is most appropriate for analysis of these data?
A) One-factor random-effects model
B) Two-factor random-effects model
C) Two-factor mixed-effects model
D) One-factor repeated measures design
E) Two-factor split-plot design

Question

Quizplus · Accepted Answer

Given that the study involves both fixed effects (the attendance program, which is deliberately manipulated) and random effects (the classes, which are randomly selected from a larger population), a two-factor mixed-effects model is most appropriate. This model can account for the fixed effect of the intervention and the random effects associated with the selection of classes.

In the Same Study as Described in Question 3, Gilbert