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.