Concept explainers
In Problems 13-19, assume that the population of x values has an approximately
Hospitals: Charity Care What percentage of hospitals provide at least some charity care? The following problem is based on information taken from State Health Care Data: Utilization. Spending, and Characteristics (American Medical Association). Based on a random sample of hospital reports from eastern states, the following information was obtained (units in percentage of hospitals providing at least some charity care):
57.156.253.066.159.064.770.164.753.578.2
(a) Use a calculator with mean and sample standard deviation keys to verify that
(b) Find a 90% confidence interval for the population average
(c)Interpretation What does the confidence interval mean in the context of this problem?
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Understanding Basic Statistics
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