15 employess pay rates are as follows 38.5 33.5 40 50.5 54 44 54.5 42 55 48.5 53 53 55 52 55 You create a distribution of payrate of our employees. The mean pay rate is 48. The standard deviation is 7. What is the z-score for a pay rate of 34? Make sure to show your calculations for full credit