Elementary Statistics 7th.ed. Instructor's Review Copy
7th Edition
ISBN: 9780134683584
Author: Larson
Publisher: PEARSON
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Textbook Question
Chapter 8, Problem 1RSRD
The U.S. Department of Health & Human Services (HHS) is a department of the U.S. federal government with the motto “Improving the health, safety, and well-being of America.” The Centers for Medicare & Medicaid Services work within the HHS to help administer Medicare, Medicaid, and other health programs. They also gather information about health expenditure, program utilization, and other data. One area studied is the average amount of time that Medicare patients spend at short-stay hospitals.
You work for the Centers for Medicare & Medicaid Services. You want to test the claim that the mean length of stay for inpatients in 2015 is different than what it was in 2000 from a random sample of inpatient records. The results for several inpatients from 2000 and 2015 are shown in the histograms.
EXERCISES
1. How Could You Do It?
Explain how you could use each sampling technique to select the sample for the study.
- (a) stratified sample
- (b) cluster sample
- (c) systematic sample
- (d) simple random sample
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Chapter 8 Solutions
Elementary Statistics 7th.ed. Instructor's Review Copy
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