A Researcher Wants to Use a Paired Sample to Determine

A researcher wants to use a paired sample to determine whether the mean number of hours spent exercising per week for married men differs from the mean number of hours spent exercising per
Week for married women. Identify the paired-difference variable for the proposed hypothesis test.

A) Difference between hours of weekly exercise of a randomly selected married man and hours of weekly exercise of a randomly selected married woman
B) Difference between hours of weekly exercise for a married man and hours of weekly exercise before he was married
C) Difference between mean hours of weekly exercise of married men and mean hours of weekly exercise of married women
D) Difference between hours of weekly exercise for a married man and hours of weekly exercise of his wife

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