Paul Browning owns and operates a medium size company that sells sunglasses and beachwear to retailers in the United States and Canada. He is interested in analyzing the effect of several variables on the weekly sales for his business. He has collected data for a sample of 20 weeks, and the data are in a file called Browning.
a. Develop the correlation matrix for these five variables.
b. Select the two variables that are most highly correlated with sales and develop a regression equation that Paul could use to predict weekly sales.

c. Determine if the overall model is statistically significant. Test using an alpha = 0.10 level.

d. Test to determine whether the two regression coefficients are statistically significant. Use an alpha€level of 0.10 and test using the p value approach.