7.31 Supermarket shoppers.
A marketing consultant observed 40 consecutive shoppers at a supermarket. One variable of interest was how much each shopper spent in the store. Here are the data (in dollars), arranged in increasing order:
shoprs
5.32 | 8.88 | 9.26 | 10.81 | 12.69 | 15.23 | 15.62 | 17.00 |
17.35 | 18.43 | 19.50 | 19.54 | 20.59 | 22.22 | 23.04 | 24.47 |
25.13 | 26.24 | 26.26 | 27.65 | 28.08 | 28.38 | 32.03 | 34.98 |
37.37 | 38.64 | 39.16 | 41.02 | 42.97 | 44.67 | 45.40 | 46.69 |
49.39 | 52.75 | 54.80 | 59.07 | 60.22 | 84.36 | 85.77 | 94.38 |
7.31
(a) There are three large outliers, making the data not Normal.
(b)
(c) (27.3384, 40.9296).