Question content area top Part 1 A survey is planned to determine the mean annual family medical expenses of employees o
Posted: Mon Jul 11, 2022 11:44 am
Question content area top
Part 1
A survey is planned to determine the mean annual family medicalexpenses of employees of a large company. The management of thecompany wishes to be
99%
confident that the sample mean is correct to within
±$40
of the population mean annual family medical expenses. Aprevious study indicates that the standard deviation isapproximately
$260.
a. How large a sample is necessary?
b. If management wants to be correct to within
±$30,
how many employees need to be selected?Click here to viewpage 1 of the cumulative standardized normal distributiontable.
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Click here to view page 2 of the cumulative standardized normaldistribution table.
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Question content area bottom
Part 1
a. How large a sample is necessary?
n=enter your response here
(Round up to the nearest integer.)
Part 2
b. If management wants to be correct to within
±$30,
how many employees need to be selected?
n=enter your response here
(Round up to the nearest integer.)
Part 1
A survey is planned to determine the mean annual family medicalexpenses of employees of a large company. The management of thecompany wishes to be
99%
confident that the sample mean is correct to within
±$40
of the population mean annual family medical expenses. Aprevious study indicates that the standard deviation isapproximately
$260.
a. How large a sample is necessary?
b. If management wants to be correct to within
±$30,
how many employees need to be selected?Click here to viewpage 1 of the cumulative standardized normal distributiontable.
LOADING...
Click here to view page 2 of the cumulative standardized normaldistribution table.
LOADING...
Question content area bottom
Part 1
a. How large a sample is necessary?
n=enter your response here
(Round up to the nearest integer.)
Part 2
b. If management wants to be correct to within
±$30,
how many employees need to be selected?
n=enter your response here
(Round up to the nearest integer.)