Question

A simple random sample size of 40 is drawn from a population. The sample mean is found to be x overbar equals 120.1x=120.1

and the sample standard deviation is found to be

s equals 12.8s=12.8.

Construct a 99% confidence interval for the population mean.

Answer #1

A simple random sample of size n equals 40 is drawn from a
population. The sample mean is found to be x overbar equals 120.2
and the sample standard deviation is found to be s equals 13.2.
Construct a 99% confidence interval for the population mean.

A simple random sample of size
n equals n=40
is drawn from a population. The sample mean is found to be
x overbar equals x=121.2
and the sample standard deviation is found to be
s equals s=12.4.
Construct a 99% confidence interval for the population
mean.
Find the lower and upper bounds.

A simple random sample of size n equals 40n=40 is drawn from a
population. The sample mean is found to be x overbar equals
121.6x=121.6 and the sample standard deviation is found to be s
equals 12.4s=12.4. Construct a 99% confidence interval for the
population mean. The lower bound is _____. The Upper bound is
____.

A simple random sample of size n equals 40 is drawn from a
population. The sample mean is found to be x overbar equals 121.4
and the sample standard deviation is found to be s equals 12.4.
Construct a 99% confidence interval for the population mean.
The lower bound is ?. (Round to two decimal places as
needed.)
The upper bound is ?. (Round to two decimal places as
needed.)

A simple random sample of size n equals n=40 is drawn from a
population. The sample mean is found to be x=120.4 and the sample
standard deviation is found to be s equals s=12.5. Construct a 99%
confidence interval for the population mean.
a) The lower bound is __
b) The upper bound is ___
(Round to two decimal places as needed.)

A simple random sample of size
n=22
is drawn from a population that is normally distributed. The
sample mean is found to be
x overbar 69
and the sample standard deviation is found to be
s equals=20.
Construct a
90%
confidence interval about the population mean.
The
90%
confidence interval is
(?,?)

A simple random sample of size n =24 is drawn from a population
that is normally distributed. The sample mean is found to be x
overbar equals 58 and the sample standard deviation is found to be
s=12. Construct a 90% confidence interval about the population
mean.
The lower bound is?
The upper bound is?

A simple random sample of size nequals24 is drawn from a
population that is normally distributed. The sample mean is found
to be x overbar equals 58 and the sample standard deviation is
found to be sequals10. Construct a 90% confidence interval about
the population mean. The 90% confidence interval is ( nothing,
nothing). (Round to two decimal places as needed.)

A simple random sample of size nequals17 is drawn from a
population that is normally distributed. The sample mean is found
to be x overbar equals 61 and the sample standard deviation is
found to be sequals11. Construct a 95% confidence interval about
the population mean. The 95% confidence interval is ( nothing,
nothing). (Round to two decimal places as needed.)

A simple random sample of size n=18 is drawn from a population
that is normally distributed. The sample mean is found to be x
overbar =50 and the sample standard deviation is found to be s=14.
Construct a 90% confidence interval about the population mean.

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