Business Economics/Statics
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?
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 56.1
#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
