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Mathematics 341 - Spring 2013
Homework
Chapter 5
Exercise: 5.28
Also:
1. Yule (in 1900) presented the following table of data on the heights of 210 married couples:
| Tall wife | Medium wife | Short wife | |
|---|---|---|---|
| Tall husband | 18 | 28 | 19 |
| Medium husband | 20 | 51 | 28 |
| Short husband | 12 | 25 | 9 |
Test the hypothesis that the heights of husbands and wives are independent.
2. In a study of the relationship between tonsil size and the carrier for streptococcus pyogenes, 1398 school children were examined, with the following results:
| Normal | Enlarged | Much enlarged | |
|---|---|---|---|
| Carrier present | 19 | 29 | 24 |
| Carrier absent | 497 | 560 | 269 |
Test the hypothesis that tonsil size and the absence or presence of the carrier are independent.
