Question

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.)

Answer #2

answered by: anonymous

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 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 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 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=13 is drawn from a population
that is normally distributed. The sample mean is found to be x
overbar equals 50 and the sample standard deviation is found to be
s=12. Construct a 95% confidence interval about the population
mean. The lower bound is nothing. The upper bound is nothing.
(Round to two decimal places as needed.).

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 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.

A simple random sample of size n is drawn from a population that
is normally distributed. The sample mean x bar is found to be
109,
and the sample standard deviation, s, is found to be 10.
a. Construct 95% confidence interval about miu, if the sample
size n is 28. Find lower and upper bound.
b. Construct 95% confidence interval about miu, if the sample
size n is 17. Find lower and upper bound.
c.Construct 80% confidence interval about...

A simple random sample of size
nequals=1717
is drawn from a population that is normally distributed. The
sample mean is found to be
x overbar equals 65x=65
and the sample standard deviation is found to be
sequals=1414.
Construct a
9595%
confidence interval about the population mean.
The lower bound is
nothing.
The upper bound is
nothing.
(Round to two decimal places as needed.)

A simple random sample of size n is drawn from a population that
is normally distributed. The sample mean, x bar over x, is found to
be 109, and the sample standard deviation, s, is found to be
10.
a) Construct a 96% confidence interval about mu if the sample
size, n, is 29
lower bound: __ upper bound: __
b) Re-do, but with a different interval. Construct a 95%
confidence interval about mu if sample size n, is 29...

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