Food sales. Sales (in $) for one week were collected for 18 stores in a food store chain in the northeastern United States. The stores and the towns they are located in vary in size.

a) Make a suitable display of the sales from the data provided.

b) Summarize the central value for sales for this week with a median and mean. Why do they differ?

c) Given what you know about the distribution, which of these measures does the better job of summarizing the stores’ sales? Why?

d) Summarize the spread of the sales distribution with a standard deviation and with an IQR.

e) Given what you know about the distribution, which of these measures does the better job of summarizing the spread of stores’ sales? Why?

f) If we were to remove the outliers from the data, how would you expect the mean, median, standard deviation, and IQR to change?