A Sports Dietician Wanted to Test the Impact of Four

Multiple Choice

A sports dietician wanted to test the impact of four different dietary supplements ('Placebo', 'Vitamin X', 'Vitamin Z' and 'Kale') on a team of thirty randomly selected elite athletes. She wanted to compare the impact of each supplement on each athlete's individual performance scores and across the team, as well as any interaction effects. What sort of test design best suits this study?

A) Independent factorial design
B) ANOVA
C) Repeated-measures factorial design
D) Multiple linear regression.