Question: It is claimed that a car is driven on the average more than 20 000 kilometers per year. To test this claim, a random sample

It is claimed that a car is driven on the average more than 20 000 kilometers per year. To test this claim, a random sample of 30 car owners has been selected. The owners were asked to keep record of the kilometers they travel. Would you agree with this claim if the random sample showed an average of 22 500 kilometers and a standard deviation of 5 500 kilometers ? Use a 0.05 level of significance to justify your answer. (Then, construct the 95% confidence interval)

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