What percentage of hospitals provides at least some charity care? 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 |

Use a calculator with mean and sample standard deviation keys to verify that x = 62.3% and s = 8.0%. Find a 90% confidence interval for the population average µ of the percentage of hospitals providing at least some charity care.

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Determine population average-confidence interval : Find a 90% confidence interval for the population average µ of the percentage of hospitals providing at least some charity care. |

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