hypothesis so that the rejection of the null hypothesis \( \mu=10.5 \) implies that it takes longer than indicated.
29. It is claimed that sports car owner drive on the average 18000 miles per year. A consumer firm believes that the average mileage is probably lower. To check, the consumer firm obtained information from 17 randomly selected sports car owner that resulted in a sample mean of 17463 miles with standard deviation of 1348 miles. What can we conclude about this claim? Use \( \alpha=0.01 \)
30. In attempting to control the strength of the wastes discharged into 2
