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Submit Answer 12. [0.76/2.28 Points] DETAILS MY NOTES PREVIOUS ANSWERS ASK YOUR TEACHER PRACTICE ANOTHER 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): 57.5 56.1 53.5 66.5 59.0 64.7 70.1 64.7 53.5 78.2 USE SALT 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 $\bar{x}$ and the sample standard deviation $s$. (Round your standard deviation to four decimal places.) $\bar{x}$ = 62.38 % $s$ = 8.0276 x % (b) Find a 90% confidence interval for the population average $\mu$ of the percentage of hospitals providing at least some charity care. (Enter your answer in the form: lower limit to upper limit. Include the word "to." Round your numerical values to one decimal place.) 58.2 to 66.6 x

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12. [0.76/2.28 Points] DETAILS MY NOTES PREVIOUS ANSWERS ASK YOUR TEACHER PRACTICE ANOTHER
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):
57.5 56.1 53.5 66.5 59.0 64.7 70.1 64.7 53.5 78.2
USE SALT
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 $\bar{x}$ and the sample standard deviation $s$. (Round your standard deviation to four decimal places.)
$\bar{x}$ = 62.38 %
$s$ = 8.0276 x %
(b) Find a 90% confidence interval for the population average $\mu$ of the percentage of hospitals providing at least some charity care. (Enter your answer in the form: lower limit to upper limit. Include the word "to." Round your numerical values to one
decimal place.)
58.2 to 66.6 x

$Submit Answer 12. [0.76/2.28 Points] DETAILS MY NOTES PREVIOUS ANSWERS ASK YOUR TEACHER PRACTICE ANOTHER 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): 57.5 56.1 53.5 66.5 59.0 64.7 70.1 64.7 53.5 78.2 USE SALT 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 x̅ and the sample standard deviation s. (Round your standard deviation to four decimal places.) x̅ = 62.38 % s = 8.0276 x % (b) Find a 90% confidence interval for the population average $\mu$ of the percentage of hospitals providing at least some charity care. (Enter your answer in the form: lower limit to upper limit. Include the word "to." Round your numerical values to one decimal place.) 58.2 to 66.6 x$

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