For parts (a) through (c) below, choose a test for each situation: one-sample t-test, two-sample t-test, paired t-test, and no t-test. a. A random sample of university students who played sports in high school are asked about their credit hours. Our goal is to determine whether the mean credit hours for students who played sports in high school is significantly different from the population mean credit hours for all the students at the university This situation should use because b. Students observe the professor ratings for a random sample of tenured professors and a random sample of female professors. This situation should use because c. A researcher goes to the parking lot of a large retail chain and observes whether each person is male or female and whether they used a shopping cart (yes or no) This situation should use because