Reference no: EM132474424

Antonio wanted to predict the amount of sales per week based on the number of sale promotions, the amount spent on commercials, and the amount spent on magazine advertisements. 

Given the following 95% confidence interval for the population slope of amount spent on commercials, select the choice that correctly interprets the interval.

(81.038, 89.032)

A.) We are 95% confident that the average change in commercials for a 1 dollar increase in sales is between 81.038 and 89.032.

B.) We are 95% confident that the average change in sales for a 1 dollar increase in amount spent on commercials is between 81.038 and 89.032 with similar values for other variables.

C.) We are 95% confident that the average change in commercials for a 1 dollar increase in sales is between 81.038 and 89.032 with similar values for other variables. 

D.) We are 95% confident that the average change in sales for a 1 dollar increase in amount spent on commercials is between 81.038 and 89.032.