K A study was conducted to estimate hospital costs for accident victims who wore seat belts. Twenty randomly selected cases have a distribution that appears to be approximately bell shaped with a mean of $9984 and a standard deviation of $5639. Complete parts (a) and (b). a. Construct the 95% confidence interval for the mean of all such costs. $

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K
A study was conducted to estimate hospital costs for accident victims who wore seat belts. Twenty randomly selected
cases have a distribution that appears to be approximately bell shaped with a mean of $9984 and a standard
deviation of $5639. Complete parts (a) and (b).
a. Construct the 95% confidence interval for the mean of all such costs.
$
<H<$[
(Round to the nearest dollar as needed.)
FE
Transcribed Image Text:K A study was conducted to estimate hospital costs for accident victims who wore seat belts. Twenty randomly selected cases have a distribution that appears to be approximately bell shaped with a mean of $9984 and a standard deviation of $5639. Complete parts (a) and (b). a. Construct the 95% confidence interval for the mean of all such costs. $ <H<$[ (Round to the nearest dollar as needed.) FE
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