Student Solutions Manual for Devore's Probability and Statistics for Engineering and the Sciences, 9th
9th Edition
ISBN: 9798214004020
Author: Jay L. Devore
Publisher: Cengage Learning US
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Textbook Question
Chapter 13.2, Problem 24E
Kyphosis refers to severe forward flexion of the spine following corrective spinal surgery. A study carried out to determine risk factors for kyphosis reported the accompanying ages (months) for 40 subjects at the time of the operation; the first 18 subjects did have kyphosis and the remaining 22 did not.
Kyphosis | 12 | 15 | 42 | 52 | 59 | 73 |
82 | 91 | 96 | 105 | 114 | 120 | |
121 | 128 | 130 | 139 | 139 | 157 | |
No kyphosis | 1 | 1 | 2 | 8 | 11 | 18 |
22 | 31 | 37 | 61 | 72 | 81 | |
97 | 112 | 118 | 127 | 131 | 140 | |
151 | 159 | 177 | 206 |
Use the Minitab logistic regression output on the next page to decide whether age appears to have a significant impact on the presence of kyphosis.
95% | Cl | ||||||
Predictor | Coef | StDev | Z | P | Odds Ratio | Lower | Upper |
Constant | -0 .5727 | 0 .6024 | -0 .95 | 0.342 | |||
age | 0 .004296 | 0 .005849 | 0 .73 | 0.463 | 1. 00 | 0.99 | 1.02 |
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Chapter 13 Solutions
Student Solutions Manual for Devore's Probability and Statistics for Engineering and the Sciences, 9th
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