A clinic provides a program to help their clients lose weight and asks a consumer agency to investigate the effectiveness of the program. The agency takes a sample of 15 people, weighing each person in the sample before the program begins and 3 months later.

Which hypothesis test methods would be appropriate for this data set? Select all that apply. The answer should be more than 1 choice. Explain all 4 of them.

Independent t test

Paired t test

ANOVA

Nonparametric paired test