A auto maker is interested in information about how long transmissions last. A sample of transmissions are run constantly and the number of miles before the transmission fails is recorded. The auto maker claims that the transmissions can run constantly for over 150,000 miles before failure. The results of the sample are given below. Miles (1000s of miles) Mean 151.2 Variance 17.22 What is the level of significance? Ex: 0.12 Observations 44 Hypothesized Mean 150 What is the null hypothesis Ho? Pick df 43 t Stat 1.889 P(T<=t) one-tail 0.033 What is the alternative hypothesis H¿? Pick t Critical one-tail P(T<=t) two-tail t Critical two-tail Confidence Level(95.0%)| 1.129 1.681 Should Ho be rejected or does Ho fail to be rejected? Pick 0.066 | 2.017 What conclusion can be drawn from the data? v Pick Convincing evidence does not exist to conclude that the mean life of a transmission is over 150,000 miles. Convincing evidence exists to conclude that the mean life of a transmission is over 150,000 miles. Does tne conidence intervar support the resuits of ne nypotnesis test? PICK Why? Pick

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