1.45 Sales revenue totals (in dollars) by day of the week are contained in the data file Stordata.

Prepare a cross table that contains the days of the week as rows and the four sales quartile intervals as columns.

a. Compute the row percentages.

b. What are the major differences in sales level by day of the week as indicated by the row percentages?

c. Describe the expected sales volume patterns over the week based on this table.