Find the critical value and test statistic value follows normal distribution.
1. Using the z-table (Table E), find the critical value (or values) for a a = .14 right-tailed test.
A) .1406
B) 1.08
C) 0.0557
D) 1.54
2. At a certain university, the average cost of books per student was $400 per student last semester. In a sample of 40 students this semester, their average cost was $430 with a standard deviation of $80. The Dean of Students believes that the costs are greater this semester. What is the test value for this hypothesis?
A) 15.00
B) 2.37
C) 0.38
D) 0.75