Students attending West Valley Community College buy their textbooks online from one of two different book sellers because the college does not have a bookstore. The following data represent sample amounts that students spend on books per term:

Calculate this value for n1  2 and n2  3. Now calculate the probability of any one of the possible Mann–Whitney U-values.

c. List all the possible Mann–Whitney U-values you obtained in part

a. Then using part

b, calculate the probability that each of these U-values occurs, thereby producing the sampling distribution for the Mann–Whitney U statistic when n1  2 and n2  3.