John wanted to predict the number 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 magazine advertisements, select the choice that correctly interprets the interval. (88.038, 98.032) a. We are 95% confident that the average change in amount spent on magazine advertisements for a 1 dollar increase in sales is between 88.038 and 98.032.
b. We are 95% confident that the average change in sales for a 1 dollar increase in amount spent on magazine advertisements is between 88.038 and 98.032 with similar values for other variables.
c. We are 95% confident that the average change in sales for a 1 dollar increase in amount spent on magazine advertisements is between 88.038 and 98.032 .
d. We are 95% confident that the average change in amount spent on magazine advertisements for a 1 dollar increase in sales is between 88.038 and 98.032 with similar values for other variables.