What percentage of hospitals provide at least some charity care? Based on a random sample of hospital reports from eastern states, the following information is obtained (units in percentage of hospitals providing at least some charity care): 56.6 56 53.1 66.4 59.0 64.7 70.1 64.7 53.5 78.2 Assume that the population of x values has an approximately normal distribution. a. Use a calculator with mean and sample standard deviation keys to find the sample mean percentage x and the sample standard deviation s. (Round your answers your one decimal place.) x= s= b. Find a 90% confidence interval for the population average u of the percentage of hospitals providing at least some charity care. (Round your answers time one decimal place) lower limit: upper limit:
What percentage of hospitals provide at least some charity care? Based on a random sample of hospital reports from eastern states, the following information is obtained (units in percentage of hospitals providing at least some charity care):
56.6 56 53.1 66.4 59.0 64.7 70.1 64.7 53.5 78.2
Assume that the population of x values has an approximately
a. Use a calculator with mean and sample standard deviation keys to find the sample mean percentage x and the sample standard deviation s. (Round your answers your one decimal place.)
x=
s=
b. Find a 90% confidence interval for the population average u of the percentage of hospitals providing at least some charity care. (Round your answers time one decimal place)
lower limit:
upper limit:
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