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In: Statistics and Probability

2. (25pts) The decrease in cholesterol level after eating a certain brand of oatmeal for breakfast...

2. (25pts) The decrease in cholesterol level after eating a certain brand of oatmeal for breakfast for one month in people with cholesterol levels is Normally distributed. A random sample of 25 adults was selected and mean 8.5 and standard deviation 3. The brand advertises that eating its oatmeal for breakfast daily for one month will produce a mean decrease in cholesterol of more than 10 units for people with cholesterol levels. (α= 0.05)

c. Report a 95% one-sided confidence interval for the mean decrease in cholesterol.

d. What is the power of the test?

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