14. Data from the Framingham Study allow us to compare the distributions of initial serum cholesterol levels
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Question:
a. What is the probability of making a type 1 error?
b. If a sample size 25 is selected from the population of mean who do not go on to develop coronary heart disease, what is the probability of making a type II error?
c.What is the power of the test?
d. How could you increase the power?
e. You wish to test the null hypothesis
Ho:u244 mg/100ml against the alternative HA:U<244mg/100ml
at the 0.05 level of significance. If the true population mean is as low as 219 mg/100ml, you want to risk only a 5% chance of failing to reject Ho. How large a sample would be required?
f. How would the sample size change if you were willing to risk a 10% chance of failing to reject a false null hypothesis?
Related Book For
Introduction To Probability And Statistics
ISBN: 9781133103752
14th Edition
Authors: William Mendenhall, Robert Beaver, Barbara Beaver
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