Question

A national food product company believes that it sells more frozen pizza during the winter months than during the summer months. Average weekly sales for a sample of stores in a metropolitan area over a​ three-year period provided the following data for sales volume​ (in pounds) during the two seasons. Complete parts a through c. Season N Mean StDev Minimum Maximum Winter 36 33 comma 988 14 comma 709 16 comma 848 74 comma 389 Summer 40 23 comma 600 8 comma 865 13 comma 992 57 comma 839 ​a) How much difference is there between the mean amount of this brand of frozen pizza sold​ (in pounds) between the two​ seasons? (Assume that this time frame represents typical sales in the given metropolitan​ area.) The positive difference is 10388. ​b) Construct and interpret a 98​% confidence interval for the differences between weekly sales during the winter and summer months. The 98​% confidence interval for the difference muwinterminusmusummer is ​( nothing​, nothing​). ​(Round to two decimal places as​ needed.) Interpret the confidence interval. Choose the correct answer below. A. We are 98​% confident that the true amount by which the frozen pizza sales​ (in pounds) in the summer exceed the frozen pizza sales in the winter falls in the interval. B. We are 98​% confident that the true amount by which the frozen pizza sales​ (in pounds) in the winter exceed the frozen pizza sales in the summer falls in the interval. C. We are 98​% confident that the mean weekly frozen pizza sales​ (in pounds) falls in the interval. ​c) Suggest factors that might have influenced the sales of the frozen pizza during the winter months. Select all that apply.

Answer 1