The figures in the table come from the Monthly Sales for Retail Trade and Food Services report for 2015. The table displays the monthly sales in 2015 for book stores, household appliance stores, jewelry stores, and shoe stores. The sales amounts are shown in millions of dollars. The bottom five rows contain the mean, minimum, maximum, range, and standard deviation for each type of store.

1. On average, which type of store has the highest monthly sales and which has the lowest?
2. Which type of store has the greatest variability in sales and which has the least? What is a likely explanation for the difference in variability?

Transcribed Image Text:

Household Jewelry Book Shoe Month Appliance Stores Stores Stores Stores Jan. 2015 2,029 1,495 1,271 1,841 716 Feb. 2015 1,252 2,536 2,544 Mar. 2015 692 1,419 2,059 2,878 Арг. 2015 May 2015 690 1,342 2,212 2,698 2,822 801 1,519 2,741 Jun. 2015 733 1,531 2,254 2,481 Jul. 2015 1,543 2,144 2,809 752 Aug. 2015 Sep. 2015 1,433 2,164 1,633 3,571 1,142 1,464 1,961 2,542 782 Oct. 2015 1,394 2,083 2,641 2,800 Nov. 2015 793 1,543 2,486 Dec. 2015 1,454 1,592 5,807 3,938 Mean 974 1,442 2,524 2,813 Minimum 1,841 690 1,252 2,029 Maximum 1,592 5,807 1,633 3,938 1,909 Range Std Dev 943 340 3,966 356 111 1,065 501