The Average Cost of Tuition, Room and Board at Small

Multiple Choice

The average cost of tuition, room and board at small private liberal arts colleges is reported to be $8,500 per term, but a financial administrator believes that the average cost is higher. A study conducted using 350 small liberal arts colleges showed that the average cost per term is $8,745 with a standard deviation of $1,200. Let = 0.05. What is the critical z-value for this test?

A) +1.96
B) -1.96
C) + 1.65
D) -1.65