Hi! These questions are confusing to me. Can you help me understand what to do for the solution?

A company decides to pilot a new program in one department (N=40) with the hope that it may increase the number of sales per month. The mean number of sales per month for those who participated in the new program is 51. The mean number of sales per month for the overall population of sales personnel at this national company is 48 with a standard deviation of 3.1. 12) What is the altemative h ;. thesis? 13) Is this one or two-tailed? 14) Conduct the ztest. Show your work (use Answer: at least two decimal places throughout). What is the Zoht score? 16) Write your conclusion in APA format. Answer: Don't forget to include the statistical statement and whether you accept or reject the null h othesis