A consumer advocate researches the length of life between two brands of refrigerators, Brand A and Brand B. He collects data(measured in years) on the longevity of 40 refrigerators for Brand A and repeats the sampling for Brand B. These data are measured in years.(You may find it useful to reference the appropriate table:z tableort table)

Brand A Brand B Brand A Brand B 23 14 16 23 16 16 19 21 22 18 21 16 19 25 12 14 18 18 18 13 12 21 15 17 21 12 24 20 21 12 15 14 25 21 21 20 22 24 12 18 15 24 16 19 17 15 17 19 21 14 12 18 23 18 25 17 15 16 15 21 13 24 25 12 15 16 13 25 15 21 13 23 19 17 22 12 25 14 14 23