Regression Analysis

In trying to look at the effects of shopping center expansion, the Commerce Department decided to look at the relationship between the number of shopping centers and the retail sales for different states in the same region.  It collected the data for the North Central states in the U.S. and found the following:(PLEASE SEE ATTACHED TABLE)

a). Create a scatter plot of the data using excel.

b). Find the regression equation relating retail sales and number of shopping centers.

c). Plot the regression line (using excel) on the same plot as the data.  Do you think the line fits the data well?  Why or why not?

d). Use the regression line to predict retail sales for each state.

e). Calculate the residuals for each state.  Which state has the largest residual?  Which state has the smallest?  Do the residuals support your answer to part (d)?

f). Find the standard error of the estimate.

Attached file(s):

Table_Shopping Centers.xls  View File