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OpenStudy (anonymous):
ANYONE FAMILIAR WITH T-TESTS? The average beta-endorphin levels for a sample of 10 patients 12 hours before surgery is 10.12 (coming from this data: 14.2, 15.1, 10.2, 2.9, 8.7, 11.3, 12.1, 6.5, 9.2, 11.4). The beta-endorphin levels of these SAME 10 patients are taken again 10 minutes before surgery, with the average being: 20.32 (coming from this data: 20.0, 27.9, 8.5, 20.3, 21.3, 22.9, 19.2, 25.4, 23.6, 14.) Based on these results, what can you conclude about the relationship between beta-endrophin levels 12 hours and 10 minutes before surgery? Verify your conclusion with a two-tailed t-tes
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