Exam 16: Inference for Regression

Interpret confidence and prediction intervals. -A sales manager was interested in determining if there is a relationship between College GPA and sales performance (number of units sold in the previous month) among Salespeople hired within the last year. The estimated regression equation fit to the data Was found to be significant at α = 0.05. The 95% confidence interval for the number of Units sold when GPA = 3.00 was determined to be 20.914 to 22.657. The correct Interpretation is

Interpret a scatterplot. -An operations manager was interested in determining if there is a relationship between The amount of training received by production line workers and the time it takes for them To trouble shoot a process problem. A sample of recently trained line workers was Selected. The number of hours of training time received and the time it took (in minutes) For them to trouble shoot their last process problem were captured. Based on the Scatterplot of the data shown below, we can say that