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):

57.1 56.2 53.0 66.1 59.0 64.7 70.1 64.7 53.5 78.2

(a) Use a calculator with mean and sample standard deviation keys to verify that x < 62.3% and s < 8.0%.

(b) Find a 90% confidence interval for the population average m of the percentage of hospitals providing at least some charity care.

(c) Interpretation What does the confidence interval mean in the context of this problem?

AppendixLO1