Complete hypothesis tests on problem 7 - 9. At least oneof the problems must use

Question

Complete hypothesis tests on problem 7 - 9. At least oneof the problems must use the traditional method while at least onemust use the p-value method. Show all steps clearly. a. The average speed of greyhound dogs is about 18.8 metersper second. A particular greyhound breeeder claims that herdogs are faster than the average greyhound. In a sample of 45of her dogs, they ran, on the average, 19.2 meters per second witha standard deviation of 1.4. Is her claim correct at =0.01. b.According to Beautiful Bride magazine, the average age of agroom is now 26.2 years. A sample of 16 perspective grooms inChicago revealed that their average age was 26.6 ears with astandard deviation of 5.3 years. At =0.05 is themagazine's claim correct? c. It has been claimed that a U.C.L.A. at least 40% of thestudents live on campus. From a sample of 250 students, 90live on campus. Does the evidence support this claim at=0.01? Complete hypothesis tests on problem 7 - 9. At least oneof the problems must use the traditional method while at least onemust use the p-value method. Show all steps clearly. a. The average speed of greyhound dogs is about 18.8 metersper second. A particular greyhound breeeder claims that herdogs are faster than the average greyhound. In a sample of 45of her dogs, they ran, on the average, 19.2 meters per second witha standard deviation of 1.4. Is her claim correct at =0.01. b.According to Beautiful Bride magazine, the average age of agroom is now 26.2 years. A sample of 16 perspective grooms inChicago revealed that their average age was 26.6 ears with astandard deviation of 5.3 years. At =0.05 is themagazine's claim correct? c. It has been claimed that a U.C.L.A. at least 40% of thestudents live on campus. From a sample of 250 students, 90live on campus. Does the evidence support this claim at=0.01?

Explanation / Answer

(a) Given n=45, xbar=19.2, s=1.4 =0.01, Z(0.01)=2.326 (check normal table) The test hypothesis is Ho:18.8 The test statistic is Z=(xbar-)/(s/n) =(19.2-18.8)/(1.4/sqrt(45)) =1.92 Since Z=1.92

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