Question

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?

Answer #1

Sample mean =58

Sample standard deviation =12

Sample size =24

Level of significance= 1-0.90=0.1

Degree of freedom =23

t critical value is (by using t table)=
1.714

Confidence interval formula is

=(53.8016,62.1984)

Lower confidence limit= 53.80

Upper confidence limit= 62.20

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 is drawn from a population that
is normally distributed. The sample mean, x overbar, is found to
be 105, and the sample standard deviation, s, is found to be 10.
(a) Construct a 90% confidence interval about mu if the sample
size, n, is 24. (b) Construct a 90% confidence interval about mu
if the sample size, n, is 20. (c) Construct an 80% confidence
interval about mu if the sample size, n,...

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
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 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 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 n is drawn from a population that
is normally distributed. The sample mean, x, is found to be 113,
and the sample standard deviation, s, is found to be 10.
(a) Construct a 90% confidence interval about μ if the sample
size, n, is 22.
(b) Construct a 90% confidence interval about μ if the sample
size, n, is 15.
(c) Construct an 80% confidence interval about μ if the
sample size, n, is...

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...

simple random sample of size n is drawn from a population that
is normally distributed. The sample mean, x overbar, is found to
be 112, and the sample standard deviation, s, is found to be
10.
(a) Construct a 90% confidence interval about mu if the
sample size, n, is 19.
(b) Construct a 90% confidence interval about mu if the sample
size, n, is 12.
(c) Construct an 80% confidence interval about mu if the
sample size,...

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
____.

ADVERTISEMENT

Get Answers For Free

Most questions answered within 1 hours.

ADVERTISEMENT

asked 9 minutes ago

asked 22 minutes ago

asked 26 minutes ago

asked 43 minutes ago

asked 46 minutes ago

asked 47 minutes ago

asked 47 minutes ago

asked 49 minutes ago

asked 54 minutes ago

asked 59 minutes ago

asked 1 hour ago

asked 1 hour ago