Question: A recent study claimed the aver cholesterol level for 8th grade students to be 150 with s= 30. The school nurse feels that the number

A recent study claimed the aver cholesterol level for 8th grade students to be 150 with s= 30. The school nurse feels that the number is too low. Choosing sample of 81 students, she finds that their average cholesterol is 157. Using a= 5% would this be enough evidence to indicate that the nurse is correct

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