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I am having trouble with this question--both parts of it: The National Health and Nutrition Examination Survey (NHANES) reported that in a recent year, themean

I am having trouble with this question--both parts of it:

The National Health and Nutrition Examination Survey (NHANES) reported that in a recent year, themean serum cholesterol level for U.S. adults was 202, with a standard deviation of 41 (the units aremilligrams per deciliter). Simple random sample of 110 adults is chosen.a. What is the probability that the sample mean cholesterol is greater than 210?_____________b. What is the probability that the sample mean cholesterol level is between 190 and 200?______

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