Yellowstone Park Medical Services provides emergency health care for park visitors. Such health care includes treatment for everything from indigestion and sunburn to more serious injuries. A recent issue of Yellowstone Today indicated that the average number of visitors treated each day was 21.7. The estimated standard deviation was 4.2.
For a 10-day summer period, the following data were obtained:
Day 1 2 3 4 5 6 7 8 9 10
Number treated 20 15 12 21 24 28 32 36 35 37
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