A sample of 50 students is taken from Utah Valley University (UVU). These students spent an average of $175 on books this semester, with a standard deviation of $25. A 95% confidence interval for the average amount of money spent on books for all students at UVU is equal to____. (Hint: Use Excel function to obtain the critical value.)
A)	175 3.47
B)	175 7.18
C)	175 7.51
D)	175 3.86
Answer:B
A sample of 50 students is taken from Utah Valley University (UVU). These students spent an average of $175 on books this semester, with a standard deviation of $25. A 95% confidence interval for the average amount of money spent on books for all students at UVU is equal to____. (Hint: Use Excel function to obtain the critical value.)
A)	175 3.47 B)	175 7.18 C)	175 7.51 D)	175 3.86