Question: A sales manager for an advertising agency believes there is a relationship between the number of contacts and the amount of the sales. To verify this belief, the following data was collected (PLEASE SHOW ALL CALCULATIONS):

a. What is the dependent variable? ___________________

b. What is the independent variable? ­­­­­­­­­­­­____________________________

c. What is the Y intercept of the linear equation? _____________

d. What is the slope of the linear equation? ________________

e. What is the value of the standard error of estimate? ______________

f. What is the value of the coefficient of correlation? ___________________

g. What is the value of the correlation of the coefficient of determination? _______

h. What is the regression equation?

i. What is the 95% confidence interval for 30 calls? Interpret your answer _________________________________________

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j. What is the 95% predictive interval for 30 calls? ____________________________________________________________________