solve question c using Z scores not t scores please

2. You work the human resources in your county's criminal justice department. You have noticed that it seems that probation ofcers miss more days of work in a year than parole ofcers. You think they do but you want to be sure that the difference is signicant. You collect data on the number of missed days of work and determine that the mean number of missed days for parole ofcers is 7 and the mean number of missed days for probation ofcers is 12. The grouped standard deviation is 2. You assume a normal distribution of your variables. A. What is the null hypothesis? (2 pts) B. What is your research hypothesis? That is, what is the research hypothesis embedded in the scenario. (2 pts) C. Would you reject or accept the null for a: l. One-tailed .05 test? (5 pts) ll. Twotailed .01 test? (5 pts) D. What error could you have made in c)i and c)ii above? (2 pts) E. Conceptually, what does it mean for something to be signicant? (4 pts)