Circle the best answer for the situation below. you wish to determine the effectiveness of taking omega-3 tablets to lower a person’s cholesterol. to determine this, you collect data on the cholesterol level of 50 individuals before and after a 6-week course of omega-3 tablets. which test would determine if this treatment was effective?
a. two-sample t-test for means
b. two-sample z-test for means
c. matched-pairs t-test
d. two-sample z-test for proportions