ACTIVITY 1. Answer the following questions. 1. What are the 7 step-rule in finding the mean and variance of the sampling distribution of the sample mean? 2. What are the formulas that can be used to determine the mean and variance of the sampling distribution of the sample mean for finite population (sampling without replacement) and for infinite population (sampling with replacement)?Read the problem carefully, follow the steps in solving the problem. Mr. Joel would like to find the mean and variance of the sampling distribution of the sample mean of the salary of his employees with the following numbers of employee per department (x) 4, 7, 8, 9, and 11. He selected three department as samples. Solve the problem using the 7 steps