Qusetion: Use R commands to obtain a simple random sample of size 50 from the statistical population of productivity ratings given in Example, and calculate the sample mean and sample variance. Repeat this for a total of five times, and report the five pairs of (, S2).
Example: A company of N = 10,000 employees initiates an employee productivity study in which the productivity of each employee is rated on a scale from 1 to 5. Suppose that 300 of the employees are rated 1, 700 are rated 2, 4000 are rated 3, 4000 are rated 4, and 1000 are rated 5.