Complete #11 (p. 820)
The median annual income for college graduates with a bachelor’s degree is $37,700 (The New York Times Almanac, 2006). Data (in the thousands of dollars) for a sample of college graduates with a bachelor’s degree working in the Chicago area are shown. Use the sample data to test H₀: median≤37.7 and Hₐ:median˃37.7 for the population of college graduates with a bachelor’s degree working in the Chicago area. Use a .05 level of significance. What is your conclusion?
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47.8 41.7 31.4 56.9 55.2
47.2 42.6 105.3 38.8 30.0
55.5 127.8 73.7 25.2 68.4
41.2 45.7 37.7 30.4 91.1
21.3 42.4 61.2 23.8 34.1
42.4 25.0 43.2 36.2 76.7
51.9 25.3 39.3 65.0 38.0
32.8 24.4 69.0 25.1 48.7
30.2 60.6 43.4 34.9 37.7
38.5 31.1 91.0 23.6 56.
#25 (p. 833).
The National Association of Home Builders provided data on the most of the most popular home remodeling projects. Use the Mann-Whitney-Wilcoxon test to see whether it can be concluded that the cost of kitchen remodeling differs from the cost of master bedroom remodeling. Use a .05 level of significance.
| Kitchen | Bedroom |
| 25,200 | 18,000 |
| 17,400 | 22,900 |
| 22,800 | 26,400 |
| 21,900 | 24,800 |
| 19,700 | 26,900 |
| 23,000 | 17,800 |
| 19,700 | 24,600 |
| 16,900 | 21,000 |
| 21,800 | |
| 23,600 | |
Complete #20 (p. 877)
The following were collected for the Master Blend Coffee production process. The data show the filling weights based on samples of 3-pound cans of coffee. Use these data to construct the x ¯ and R charts. What conclusions can be made about the quality of the production process? observations
sample 1 2 3 4 5
1 3.05 3.08 3.07 3.11 3.11
2 3.13 3.07 3.05 3.10 3.10
3 3.06 3.04 3.12 3.11 3.10
4 3.09 3.08 3.09 3.09 3.07
5 3.10 3.06 3.06 3.07 3.08
6 3.08 3.10 3.13 3.03 3.06
7 3.06 3.06 3.08 3.10 3.08
8 3.11 3.08 3.07 3.07 3.07
9 3.09 3.09 3.08 3.07 3.09
10 3.06 3.11 3.07 3.09 3.07
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