A research firm wants to determine whether there’s a difference in married couples between what the husband earns and what the wife earns. The firm takesa random sample of married couples and measures the annual salary of each husband and wife. What procedure should the firm use to analyze the data for the mean difference in salary within married couples?
a) One-sample t procedure, matched pair
b) Two-sample t procedure
c) One-sample z procedure, matched pair
d) Two-sample z procedure
e) Not enough information to determine which procedure should be used.
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