Hoaglin, Mosteller, and Tukey (1983) presented data on blood levels of beta-endorphin as a function of stress. They took beta-endorphin levels for 19 patients 12 hours before surgery and again 10 minutes before surgery. The data are presented below. Does there appear to be a difference in the mean level of beta endorphins present? Participant 12 hours before 10 minutes before 1 10 6.5 2 6.5 14.0 3 8.0 13.5 4 12 18 5 5.0 14.5 6 11.5 9.0 7 5.0 18.0 8 3.5 42.0 9 7.5 7.5 10 5.8 6.0 11 4.7 25.0 12 8.0 12.0 13 7.0 52.0 14 17.0 20.0 15 8.8 16.0 16 17.0 15.0 17 15.0 11.5 18 4.4 2.5 19 2.0 2.0
- Hoaglin, Mosteller, and Tukey (1983) presented data on blood levels of beta-endorphin as a
function of stress. They took beta-endorphin levels for 19 patients 12 hours before surgery and again 10 minutes before surgery. The data are presented below. Does there appear to be a difference in the mean level of beta endorphins present?
Participant 12 hours before 10 minutes before
1 10 6.5
2 6.5 14.0
3 8.0 13.5
4 12 18
5 5.0 14.5
6 11.5 9.0
7 5.0 18.0
8 3.5 42.0
9 7.5 7.5
10 5.8 6.0
11 4.7 25.0
12 8.0 12.0
13 7.0 52.0
14 17.0 20.0
15 8.8 16.0
16 17.0 15.0
17 15.0 11.5
18 4.4 2.5
19 2.0 2.0
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