Question: The WHO (Wyatt Hiring Organization) would like to predict how the trainees in its sales force will perform. At the beginning of their two-month training course, they are given an aptitude test. Sales records are kept for each trainee over the first year, the results are shown below.
(a) Plot the data on linear graph paper.
(b) Using the method of least squares, determine the equation of the line.
(c) Draw the line on the curve.
(d) Calculate and interpret the coefficient of correlation.
(e) What level of sales would you expect from an aptitude score of 40, 50, 70?