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November 22, 2014

Homework Help: Statistics

Posted by Mack on Monday, December 6, 2010 at 1:28am.

The mean serum cholesterol level in the population of males who do not develop heart disease is known to be 219 mg/100 ml. Suppose you perform a study to investigate whether the mean serum cholesterol levels in males who do develop heart disease is higher than that of the disease-free population. In a sample of 28 men who have heart disease, the sample mean serum cholesterol level is 232 mg/100 ml with a sample standard deviation of 38 mg/100 ml. Perform the appropriate test at the 0.10 level of significance.

a. Ho :

b. Ha :

c. Critical value(s) =

d. Test statistic =

e. Approximate P-value =

f. Decision:

Interpret this decision:

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