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):
57.3 | 56.3 | 52.8 | 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 to one decimal place.)
x = | % |
s = | % |
(b) Find a 90% confidence interval for the population average
μ of the percentage of hospitals providing at least some
charity care. (Round your answers to one decimal place.)
lower limit | % |
upper limit | % |
Get Answers For Free
Most questions answered within 1 hours.