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Among drivers who have had a car crash in the last year, 130 were randomly selected...

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Statistics

Among drivers who have had a car crash in the last year, 130were randomly selected and categorized by age, with the resultslisted in the table below. Age Under 25 25-44 45-64 Over 64Drivers

AgeUnder 2525-4445-64Over 64
Drivers52311730

If all ages have the same crash rate, we would expect (becauseof the age distribution of licensed drivers) the given categoriesto have 16%, 44%, 27%, 13% of the subjects, respectively. At the0.025 significance level, test the claim that the distribution ofcrashes conforms to the distribution of ages

The test statistic is

χ2=

The p-value is

The conclusion is A. There is sufficient evidence to warrant therejection of the claim that the distribution of crashes conforms tothe distibuion of ages.

B. There is not sufficient evidence to warrant the rejection ofthe claim that the distribution of crashes conforms to thedistibuion of ages.

Answer & Explanation Solved by verified expert
3.6 Ratings (364 Votes)
Claim The distribution of crashes conforms to the distributionof agesThe null and alternative hypothesis isH0 The distribution of crashes not conforms    See Answer
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