Which one is correct? If the measurements are categorical (e.g. Yes or No to the

Question

Which one is correct? If the measurements are categorical (e.g. Yes or No to the question "Do you smoke?") and taken from two distinct group (e.g. Female, Male) the analysis will involve comparing two independent means. If the measurements are quantitative (e.g. GPA) and taken from two distinct groups (e.g. Graduate, Undergraduate) the analysis will involve comparing two independent proportions. If the measurements are quantitative (e.g. Weight) and taken twice from each subject observed (e.g. subject's weight before and after dieting), the analysis will involve the mean of differences of measurements of each subject.

Explanation / Answer

Answer to the question below, with reasoning:

a. False. You cannot take mean in case of categorical variables

b. False. In case of quant variable like GPA you would compare mean of GPAs, and not any proportions

c. True. Correct to compare quant variable as mean of differences of measurement of each subjects.

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