Test Statistics Identify the test statistic that should be used for testing the following given claims. a. The mean of the differences between IQ scores of husbands and IQ scores of their wives is...

Test Statistics Identify the test statistic that should be used for testing the following given claims.

a. The mean of the differences between IQ scores of husbands and IQ scores of their wives is equal to 0.

b. The mean age of female CIA agents is equal to the mean age of male CIA agents.

c. The proportion of left-handed men is equal to the proportion of left-handed women.

d. The variation among pulse rates of women is equal to the variation among pulse rates of men.