question archive A recent study claimed the aver cholesterol level for 8th grade students to be 150 with s= 30
A recent study claimed the aver cholesterol level for 8th grade students to be 150 with s= 30
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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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