1. The WHO recommend that cholesterol levels should be below 200. Cholesterol levels for a group of individuals were recorded, and are detailed in the following table: 196 . (a) What is the standard error of the mean cholesterol level? . (b) Determine (at the 1% level) whether the average cholesterol level for the patients detailed adheres to the WHO recommendation. Clearly state any assumptions on which your conclusion relies. . (c) Construct a 95% confidence interval for the mean cholesterol level and interpret the resulting interval.
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