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> C D webwork usi edu/webwork2/Principles Stats-W Problem Previous ProblemProblem List Next Problem User Settings Grades Results for this submission Problems Entered Answer Preview Result 168.1138 168.1138 ncorrect Problem,1/ Problem 2 Y Problem 3 V Problem 4V Problem 5v Problem 6 Problem? Problem 8V Problem 9 Problem 10 Problem 11 Problem 12 Problem 13 7 8147 7.8147 correct correct At least one of the answers above is NOT correct (1 point) Among drivers who have had a car crash in the last year, 290 were randomly selected and categorized by age, with the results listed in the table below Age Under 25 25-4445-64 Over 64 Dri If all ages have the same crash rate, we would expect (Decause of the age distribution or licensed drivers) the given categories to have 16%, 44%, 27%, 13% of the subjects respectively. At the 0 05 significance level, test the claim that the distribution of crashes conforms to the distibution of a The test statistic is 2- 117 72 39 62 14 V Problem 15 The critical value is 2-78147 Problem 17 Problem 18 V Problem 19 Problem 20 The conclusion is A. There is not sufficient evidence to warrant the rejection of the claim that the distribution ot crashes conforms to the distibuion of ages e B. There is sufficient evidence to warrant the rejection of the claim that the distribution of crashes conforms to the distibuion of ages Note: You can ean partial credit on tis probiem Preview My AnswersSubmit Answers Your score was recorded You have attempted this problem 8 times You received a score of 67% for this attempt Your overall recorded score is 67% You have unlimited attempts remaining

Explanation / Answer

Age Drivers p E=p*290 (O-E)^2/E Under 25 117 0.16 46.4 107.4216 25-44 72 0.44 127.6 24.227 45-64 39 0.27 78.3 19.7253 Over 64 62 0.13 37.7 15.6629 Total 290 1 290 167.0368

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