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) :

1. What is the dependent variable? _____ ______________
2. What is the independent variable? ___ ________________________
3. What is the Y intercept of the linear equation? ________
4. What is the slope of the linear equation? _____
5. What is the value of the standard error of estimate? ____________
6. What is the value of the coefficient of correlation? ____________________
7. What is the value of the correlation of the coefficient of determination? _
8. What is the regression equation?
9. What is the 95% confidence interval for 30 calls? Interpret your answer ______________________
10. What is the 95% predictive interval for 30 calls? ___________________________________________________________________

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