The following MINITAB output presents a 95% confidence interval for the mean cholesterol levels for men aged
Question:
The following MINITAB output presents a 95%
confidence interval for the mean cholesterol levels for men aged 50 years, and a 95% prediction interval for an individual man aged 50.
The units of cholesterol are milligrams per deciliter.
a. What is the point estimate for the mean cholesterol level for men aged 50?
b. What is the 95% confidence interval for the mean cholesterol level for men aged 50?
c. Predict the cholesterol level for a man aged 50.
d. Upon learning that a man is 50 years old, someone predicts that his cholesterol level is 160.
Is this a reasonable prediction? If so, explain why. If not, give a reasonable range of predicted values.
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Kirti Kaushal
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