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Mathematics 120 - Spring 2017
Homework
Section 28.2
Exercise Set A: 1, 2, 3, 4, 5, 6, 7, 9
Section 28.3
Exercise Set B: 3
And:
The following table gives the number of deaths due to accidental falls in the United States for 1970:
| Month | Number of Deaths |
|---|---|
| January | 1668 |
| February | 1407 |
| March | 1370 |
| April | 1309 |
| May | 1341 |
| June | 1338 |
| July | 1406 |
| August | 1446 |
| September | 1332 |
| October | 1363 |
| November | 1410 |
| December | 1526 |
Test the hypothesis that deaths due to accidental falls are spread uniformly throughout the year.
Answer:
The value of the chi-square test statistics is $\chi^2 = 75.4273$. Using a chi-square distribution with 11 degrees of freedom, the p-value is less than 1%. Hence the data provide very strong evidence against the hypothesis that deaths due to accidental falls occur uniformly throughout the year.
