James Greenland has been running the following number of ads in the local newspaper over the last seven (7) weeks to help attract customers into his shoes store. He has also been keeping track of customers who have come into the store because of the ads, as well as the amount of money they spend. She has recognized that the Foreign Exchange Rate (J$ vis--vis US$) and the Inflation Rate also impact on his sales.

Based on the Regression Summary Output table, answer the following questions that James Greenland has asked.

These are the data for the last 7 weeks: Foreign Numbe Exchange r of Ads Rate (J$ = Inflation Sale of Week # (X1) US$1 (X2) Rate (X3) Shoes (Y) 1 16 90.35 7.50 330 2 12 91.00 6.25 270 3 18 91.20 10.12 380 4 14 92.08 12.50 290 5 19 93.80 6.75 300 6 22 93.45 11.00 420 7 17 94.53 8.36 362SUMMARY OUTPUT Regression Statistics 0.85346568 Multiple R 9 0.72840368 R Square 3 0.45680736 Adjusted R Square 6 39.7715595 Standard Error 8 Observations 7 ANOVA Significance df 55 MS F F 12726.6691 2.68193505 0.21964441 Regression 3 5 4242.223049 2 9