Probability and Statistics for Engineering and the Sciences STAT 400 - University Of Maryland
9th Edition
ISBN: 9781305764477
Author: Jay L. Devore
Publisher: Cengage Learning
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Chapter 15.1, Problem 5E
Both a gravimetric and a spectrophotometric method are under consideration for determining phosphate content of a particular material. Twelve samples of the material are obtained, each is split in half, and a determination is made on each half using one of the two methods, resulting in the following data:
| Sample | 1 | 2 | 3 | 4 |
| Gravimetric | 54.7 | 58.5 | 66.8 | 46.1 |
| Spectrophotometric | 55.0 | 55.7 | 62.9 | 45.5 |
| Sample | 5 | 6 | 7 | 8 |
| Gravimetric | 52.3 | 74.3 | 92.5 | 40.2 |
| Spectrophotometric | 51.1 | 75.4 | 89.6 | 38.4 |
| Sample | 9 | 10 | 11 | 12 |
| Gravimetric | 87.3 | 74.8 | 63.2 | 68.5 |
| Spectrophotometric | 86.8 | 72.5 | 62.3 | 66.0 |
Use the Wilcoxon test to decide whether one technique gives on average a different value than the other technique for this type of material.
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Chapter 15 Solutions
Probability and Statistics for Engineering and the Sciences STAT 400 - University Of Maryland
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Ch. 15.2 - Prob. 11ECh. 15.2 - The article A Study of Wood Stove Particulate...Ch. 15.2 - The urinary fluoride concentration (parts per...Ch. 15.2 - Prob. 14ECh. 15.2 - The article Measuring the Exposure of Infants to...Ch. 15.2 - Prob. 16ECh. 15.3 - Prob. 17ECh. 15.3 - Compute the 99% signed-rank interval for true...Ch. 15.3 - Prob. 19ECh. 15.3 - Prob. 20ECh. 15.3 - Prob. 21ECh. 15.3 - Compute a 99% CI for 1 2 using the data in...Ch. 15.4 - The accompanying data refers to concentration of...Ch. 15.4 - Prob. 24ECh. 15.4 - Prob. 25ECh. 15.4 - Prob. 26ECh. 15.4 - In an experiment to study the way in which...Ch. 15 - The article Effects of a Rice-Rich Versus...Ch. 15 - Prob. 29SECh. 15 - The given data on phosphorus concentration in...Ch. 15 - Prob. 31SECh. 15 - Prob. 32SECh. 15 - The sign test is a very simple procedure for...Ch. 15 - Prob. 34SECh. 15 - Prob. 35SECh. 15 - Prob. 36SE
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