The manager for a repair shop has collecteddata, as shownbelow, on the number of customers who agreed to purchase an air filter when they were also having their oil changed.

23

21

23

21

21

22

20

15

22

21

19

16

23

24

27

23

24

24

12

21

27

16

19

20

a. Compute themean, median, and mode for these data.

b. Indicate whether the data are skewed or symmetrical.

c. Construct a box and whisker plot for these data. Referring to your answer in partb, does the box plot support your conclusion aboutskewness? Discuss.