7.22 Shopping on Black Friday. The day after Thanksgiving- called Black Friday-is one of the largest shopping days BLKFRI in the United States. Winthrop University researchers conducted interviews with a sample of 38 women shop- ping on Black Friday to gauge their shopping habits and reported the results in the International Journal of Retail and Distribution Management (Vol. 39, 2011). One ques- tion was "How many hours do you usually spend shopping on Black Friday?" Data for the 38 shoppers are listed in the accompanying table. 6 695 a. Describe the population of interest to the researchers. b. What is the quantitative variable of interest to the researchers? c. Use the information in the table to estimate the popu- lation mean number of hours spent shopping on Black Friday with a 95% confidence interval. d. Give a practical interpretation of the interval. e. A retail store advertises that the true mean number of hours spent shopping on Black Friday is 5.5 hours. Should the store be sued for false advertising? Explain. 443 468 4 16 4 4 5 6655 4 4 4 4 856 7 12 5 86 10 10 11 658 5 8 8 3 353 Source: Thomas, J. B., and Peters, C. "An exploratory investigation of Black Friday consumption rituals" International Journal of Retail and Distribution Management, Vol. 39, No. 7, 2011 (Table I).