A researcher wants to examine the effect of drugs and diet on systolic blood pressure.She randomly assigns 20 individuals with high blood pressure to one of four treatments: control (no diet or drugs), diet modification only, drug only, drug and diet modification.What type of design is appropriate for this study?
A) one-way within-groups ANOVA
B) two-way within-groups ANOVA
C) two-way between-groups ANOVA
D) mixed-design ANOVA

Question

Quizplus · Accepted Answer

The study involves two independent variables (drug and diet) with different levels (drug: yes/no, diet: yes/no) and compares their effects on a dependent variable (systolic blood pressure) across different groups. This setup is best analyzed using a two-way between-groups ANOVA, which allows for the examination of the main effects of each independent variable and their interaction effect on the dependent variable.

A Researcher Wants to Examine the Effect of Drugs and Diet