Question: A “big-box” store conducts training for its sales force. To assess training effectiveness, the number of sales made during the first month after training is tabulated vs. number of training hours as shown (in part) below.

a. [5 points] Is there a linear trend between training and sales?

b. [5 points] What is the value of R²?

c. [5 points] Are there any standardized residuals >½2½?

d. [5 points] What is the predicted sales for training = 22 hours?