The managers of Mayo Department Store want to evaluate the relationship between the sales of air conditioners and the average weekly temperature. The following weekly sales data along with the average daytime temperatures for 10 one-week periods are shown in the following table:

1. Develop a linear regression equation for air conditioner sales as a function of the average weekly temperature.

2. Forecast air conditioner sales if the average weekly temperature is 88 degrees Fahrenheit.

3. Evaluate the €œgoodness of fit€ of the regression equation by computing the values of R², r, and s_yx and interpret the results.

Transcribed Image Text:

2 Week 4. 7. 10 103 Air-Conditioner Sales (in units) Avorago Temporaturo (in degroos Fahrerheit) 85 70 120 08 85 100 110 115 150 101 97 78 70 85 90 75 94 86 80