Chapter Exercises
The following problems use data from three data sets available on the com-
panion web site. Each data set contains the raw data as well as reduced or
reorganized data for ease of analysis.
1. Think of a question, problem, or issue in your organization. Design a
valid study to address the issue. Be sure to discuss how you would
address all aspects of validity, including logic, sampling, and measure-
ment. Assuming that you can collect valid data, how would you analyze
them? How would you present them?
2. Using the data in Health Insurance Coverage.xls, compare insurance
coverage in Minnesota to coverage in Texas.
a. Analyze the validity of the data.
b. Produce a histogram to compare the two states. Do Minnesota and
Texas appear to have similar coverage types?
c. Produce a Pareto chart for the two states. What does this chart indicate?
d. What is the probability that a resident of Minnesota or Texas will be
uninsured? Insured? Insured by Medicare or Medicaid?
e. What is the 95 percent CI for the proportion of uninsured in Texas?
In Minnesota? What is the 99 percent CI?
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