A Mann-Whitney U Test Was Performed to Determine If There

Multiple Choice

A Mann-Whitney U test was performed to determine if there were differences in the cost of tuition at a Texas state university versus an Oklahoma state university.The total cost,including room,board,and books for 24 freshman attending a Texas university were computed and compared to the total cost for 20 Oklahoma state university students.The U statistic was calculated to be 38.78 based on the sample sizes of 24 and 20.What is the z value for this test?

A) 0.133
B) -4.74
C) 240
D) 42.43
E) 8.75