Multiple regression
Antelope are beautiful and graceful animals that live on the high plains of the western United States. Thunder Basin National Grasslands in Wyoming is home to hundreds of antelope. The Bureau of Land Management (BLM) has been studying the Thunder Basin antelope population for the past 8 years. The variables used are
x1=spring fawn count (in hundreds of fawns)
x2= size of adult antelope population (in hundreds)
x3= annual precipitation (in inches)
x4= winter severity index (1 = mild and 5 = extremely severe) (This is an index based on temperature and wind chill factors.) The data obtained in the study over the 8-year period are shown in Table 9-15.
TABLE 9-15 Data for Thunder Basin Antelope Study | ||||
Year | x1 | x2 | x3 | x4 |
1 | 2.9 | 9.2 | 13.2 | 2 |
2 | 2.4 | 8.7 | 11.5 | 3 |
3 | 2.0 | 7.2 | 10.8 | 4 |
4 | 2.3 | 8.5 | 12.3 | 2 |
5 | 3.2 | 9.6 | 12.6 | 3 |
6 | 1.9 | 6.8 | 10.6 | 5 |
7 | 3.4 | 9.7 | 14.1 | 1 |
8 | 2.1 | 7.9 | 11.2 | 3 |
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