Question

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.)

Answer #1

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=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 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=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 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
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 =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 20 is drawn from a population
that is known to be normally distributed. The sample variance, s
squared, is determined to be 12.4. Construct a 90% confidence
interval for sigma squared. The lower bound is nothing. (Round to
two decimal places as needed.) The upper bound is nothing. (Round
to two decimal places as needed.)

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 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.)

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