An owner of a large gym franchise knows that women carry about 2/3 the muscle mass of men, so he expects that female body builders at his gym will be able to press about 2/3 of what male body builders can lift per pound of body weight. He randomly samples experienced male and female body builders to test his conjecture that the average weight women press is less than that of men.

Select one:

a.)T-test for the difference in matched pairs (paired data)

b.)Two-sample Z-Test for proportions

c.)Two-sample T-Interval for means

d.)Two-sample T-Test for means