Sociologist is interested in comparing the ages of husbands and wives. He collected the data below, which shows the ages for the husband and wife in a randomly chosen sample of nine couples.
Couple A B C D E F G H I --------------------------------------------------------
Husband's age (years) 79 39 55 71 37 39 48 63 54 --------------------------------
Wife's age (years) 70 36 49 54 38 32 49 52 56 -----------------------
At the 5% significance level, use these data to test the hypothesis that most men are older than their wives using a sign test.