7 The day after Thanksgiving called Black Friday is one of the largest shopping days in the United States Winthrop University researchers conducted interviews with a sample of 38 women shopping on Black Friday to gauge their shopping habits and re ported the results in the International Journal of Retail and Distribution Management Vol 39 2011 One question was How many hours do you usually spend shopping on Black Friday Summary statistics about data from the 38 shoppers are listed in the table below Options Summary statistics Column n Mean Variance Std dev Std err Median Range Min Max Q1 Q3 HOURS 38 6 0789474 7 5881935 2 7546676 0 44686609 5 13 3 16 4 7 20 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 population mean number of hours spent shopping on Black Friday with a 96 confidence interval