Question

Salaries of 45 college graduates who took a statistics course in college have a mean, x overbar , of $ 65 comma 900 . Assuming a standard deviation, sigma , of $12 comma 992 , construct a 95 % confidence interval for estimating the population mean u .

Answer #1

Z for 95% confidence interval = Z_{0.025} = 1.96

confidence interval

= (62104 , 69696)

Salaries of 45 college graduates who took a statistics course in
college have a mean, overbar x, of comma $65,500. Assuming a
standard deviation, sigmaσ, of $14 comma 14,971, construct a
99% confidence interval for estimating the population mean μ.
$ less than< μless than<$

Salaries of 45 college graduates who took a statistics course in
college have a mean, x, of $ 64,900 . Assuming a standard
deviation, q, of $19,881 , construct a 95 % confidence interval for
estimating the population mean u.
$ -----<μ< $------ round to nearest integer as needed

Salaries of 32 college graduates who took a statistics course in
college have a mean, x overbar, of $ 61,700. Assuming a standard
deviation, sigma, of $11,938, construct a 90% confidence
interval for estimating the population mean mu.

Salaries of 47 47 college graduates who took a statistics course
in college have a mean, x overbar x, of $ 63 comma 400 $63,400.
Assuming a standard deviation, sigma σ, of $ 11 comma 850
11,850, construct a 99 99% confidence interval for estimating the
population mean mu μ.

Salaries of 45 college graduates who took a statistics course in
college have a mean (x overbar) of $69,800. Assuming a standard
deviation, σ, of $17,150, construct a 99% confidence interval
for estimating the population mean μ. (Don't round until end of
problem)
$_____<μ<$_____
(Round to the nearest integer as needed.)

Salaries of 34 college graduates who took a statistics course in
college have a mean, x overbar, of $ 68 comma 500. Assuming a
standard deviation, sigma, of $12 comma 046, construct a 99%
confidence interval for estimating the population mean mu. Click
here to view a t distribution table.LOADING... Click here to view
page 1 of the standard normal distribution table.LOADING... Click
here to view page 2 of the standard normal distribution
table.LOADING... $ nothingless than muless than$ nothing...

Salaries of 34 college graduates who took a statistics course in
college have a mean, x overbar, of $ 68 comma 500. Assuming a
standard deviation, sigma, of $12 comma 046, construct a 99%
confidence interval for estimating the population mean mu. Click
here to view a t distribution table.LOADING... Click here to view
page 1 of the standard normal distribution table.LOADING... Click
here to view page 2 of the standard normal distribution
table.LOADING... $ nothingless than muless than$ nothing...

Salaries of 4747 college graduates who took a statistics course
in college have a mean, x overbarx, of $63,000. Assuming a
standard deviation, sigmaσ, of $16 comma 37216,372, construct
a
9090% confidence interval for estimating the population mean
μ.
(Round to the nearest integer as needed.)

Salaries of
4848
college graduates who took a statistics course in college have
a mean,
x overbarx,
of
$ 69 comma 000$69,000.
Assuming a standard deviation,
sigmaσ,
of
$15 comma 65215,652,
construct a
9595%
confidence interval for estimating the population mean
muμ.
$nothingless than<muμless than<$nothing
(Round to the nearest integer as needed.)

Salaries of 44 college graduates who took a statistics course in
college have a mean,xbar,of $63,600.Assuming a standard
deviation,σ,of $12,063,construct a 95% confidence interval for
estimating the population mean μ.
____< mu<____

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