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The mean serum cholesterol level for U.S. adults was 197 with a standard deviation of 38 (the units are milligrams per deciliters). A sample of

The mean serum cholesterol level for U.S. adults was 197 with a standard deviation of 38 (the units are milligrams per deciliters). A sample of 105 adults is chosen. Round answer to 4 decimals.

A. Would it be unusual for the sample mean cholesterol to be less than 192?

B. What is the probability that the sample mean cholesterol is between 183 and 195?

C. What is the probability that the sample mean cholesterol is greater than 206?

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