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2 weeks ago
Hospital stays Hospital nurses sampled records of 58 surgery patients. They wondered if length of surgery (in hours) might be related to the length of the hospital stay (in days). To find out, they created the regression analysis shown. (SHOW WORK. Don’t bother writing hypotheses, and you may assume the assumptions for inference were all satisfied.)

a.df = ______, t = ______, P = ______
b. State your conclusion.
Textbook 

Stats: Modeling the World


Edition: 4th
Authors:
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wrote...
Posts: 259
2 weeks ago
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a.df = 58 - 2 = 56
t = 14.142
P < 0.0001
b. The P-value is very small, indicating that the association we see in the table is unlikely to have occurred by chance. We reject the null hypothesis and conclude that there is strong evidence that, on average, the hospital stay is expected to increase by 1.29 days for each additional hour of surgery.
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2 weeks ago
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