QUESTION 3 The average hourly wage last year for members of the hospital clerical staff in a large city was $7.25. The standard deviation of the population was $0.85. This year a sample of 35 workers had an average hourly wage of $7.40. Test the claim that the average has not changed using a = 0.01, which of the following is true? O a. Reject the null hypothesis. O b. There is not enough evidence to support the claim. O c. The test value for this test is z = -6.68. O d. The test value for this test is z = 1.04