MATLAB: An Introduction with Applications
6th Edition
ISBN: 9781119256830
Author: Amos Gilat
Publisher: John Wiley & Sons Inc
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Among drivers who have had a car crash in the last year, 300 were randomly selected and categorized by age, with the results listed in the table below.
Age | Under 25 | 25-44 | 45-64 | Over 64 |
Drivers | 125 | 64 | 42 | 69 |
If all ages have the same crash rate, we would expect (because of the age distribution of licensed drivers) the given categories to have 16%, 44%, 27%, 13% of the subjects, respectively. At the 0.025 significance level, test the claim that the distribution of crashes conforms to the distribution of ages.
The test statistic is χ2=
The critical value is χ2=
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