A company is concerned with the high cholesterol levels of many of its employees. To help combat
Question:
a. Is this sample evidence “proof” that the exercise facility, when used, tends to lower the mean cholesterol level? Phrase this as a hypothesis testing problem and do the appropriate analysis.
Do you feel comfortable that your analysis answers the question definitively (one way or the other)? Why or why not?
b. Repeat part a, but replace “mean cholesterol level” with “percentage with level over 215.”
c. What can you say about causality? Could you ever conclude from such a study that the exercise causes low cholesterol? Why or why not?
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Related Book For
Data Analysis and Decision Making
ISBN: 978-0538476126
4th edition
Authors: Christian Albright, Wayne Winston, Christopher Zappe
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