You want to know if, on average, participants weigh significantly less at the end of a weight-loss program than they did at the start of the program. Which would be an appropriate procedure to use?
A) Frequencies
B) One-Way ANOVA
C) Paired-Samples T Test
D) Univariate General Linear Model (Two-Way ANOVA)

Question

Quizplus · Accepted Answer

The appropriate procedure to use in this case would be a paired-samples t test. This is because you are comparing the same group of participants at two different time points (before and after the weight-loss program). The t test would allow you to determine whether there is a significant difference in weight between these two time points, indicating whether or not the weight-loss program was effective on average. Option A is not appropriate because frequencies are used to report the number of observations in different categories, rather than comparing means. Option B is not appropriate because ANOVA is used to compare means across different groups, whereas you are comparing means within the same group. Option D is not appropriate because a univariate general linear model (two-way ANOVA) is used to assess the effects of two categorical independent variables on a continuous dependent variable.

You Want to Know If, on Average, Participants Weigh Significantly