The manufacturer of a light fixture believes that the dollars spent on advertising, the price of the fixture and the number of retail stores selling the fixture in a particular month influence the light fixture sales. The manufacturer randomly selects 10 months and collects the following data:

The manufacturer of a light fixture believes that the dollars spent on advertising, the price of the fixture and the number of retail stores selling the fixture in a particular month influence the light fixture sales. The manufacturer randomly selects 10 months and collects the following data Number of Stores SalesAdvertisingPrice 20 40 40 50 50 60 100 70 70 101 80 110 90 40 60 20 80 10 40 20 60 30 40 10 42 59 60 81 80 4 7 82 Using Excel, perform multiple regression analysis, with sales as the dependent variable and advertising, price and number of stores as independent variables