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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 40 30,085 14,815 14,631 73,746 Summer 35 22,209 7,557 13,225 59,858 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 b) Construct and interpret a 95% confidence interval for the differences between weekly sales during the winter and summer months. The 95% confidence interval for the difference Hwinter - summer is (). (Round to two decimal places as needed.) Interpret the confidence interval. Choose the correct answer below. O A. We are 95% 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. O B. We are 95% 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. O C. We are 95% 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. A. Weather B. Different sporting events c. Cost of ingredients