Question

Use the standard normal distribution or the t-distribution to construct a 90%confidence interval for the population mean. Justify your decision. If neither distribution can be used, explain why. Interpret the results. In a random sample of 16 mortgage institutions, the mean interest rate was 3.52% and the standard deviation was 0.36%. Assume the interest rates are normally distributed.

Which distribution should be used to construct the confidence interval?

Answer #1

use the standard normal distribution or the t-distribution to
construct a 90% confidence interval for the population mean.
justify your decision. if neither distribution can be used explain
why. interpret the results.
In a random sample of 24 mortgage institutions, the mean
interest rate was 3.62% and the standard deviation was 0.41% Assume
the interest rates are normally distributed.
which distribution should be used to construct the confidence
interval?
The 90% confidence interval is?
Interpret the results

Use the standard normal distribution or the t-distribution to
construct a 95% confidence interval for the population mean.
Justify your decision. If neither distribution can be used,
explain why. Interpret the results. In a random sample of 12
mortgage institutions, the mean interest rate was 3.57% and the
standard deviation was 0.38%. Assume the interest rates are
normally distributed.

Use the standard normal distribution or the t-distribution to
construct a 99% confidence interval for the population mean.
Justify your decision. If neither distribution can be used,
explain why. Interpret the results. In a random sample of 13
mortgage institutions, the mean interest rate was 3.59% and the
standard deviation was 0.42%. Assume the interest rates are
normally distributed.
Select the correct choice below and, if necessary, fill in any
answer boxes to complete your choice.
A. The 99% confidence...

Use the standard normal distribution or the t-distribution to
construct a 99% confidence interval for the population mean.
Justify your decision. If neither distribution can be used,
explain why. Interpret the results.
In a recent season, the population standard deviation of the
yards per carry for all running backs was 1.21. The yards per carry
of 25 randomly selected running backs are shown below. Assume the
yards per carry are normally distributed.
1.6 3.4 2.8 6.9 6.1 5.8 7.3 6.5...

Use the standard normal distribution or the t-distribution to
construct a
95%
confidence interval for the population mean. Justify your
decision. If neither distribution can be used, explain why.
Interpret the results. In a random sample of
fortyone
people, the mean body mass index (BMI) was
27.7
and the standard deviation was
6.24
Which distribution should be used to construct the confidence
interval? Choose the correct answer below.
(Use a t-distribution because the sample is random n>=30, and
o is...

Use the standard normal distribution or the t-distribution to
construct a
99%
confidence interval for the population mean. Justify your
decision. If neither distribution can be used, explain why.
Interpret the results.
In a recent season, the population standard deviation of the
yards per carry for all running backs was
1.31.
The yards per carry of 25 randomly selected running backs are
shown below. Assume the yards per carry are normally
distributed.
1.3
5.8
6.1
5.6
7.3
7.1
4.7
2.8...

1) The monthly incomes for 12 randomly selected people, each
with a bachelor's degree in economics, are shown on the right.
Complete parts (a) through (c) below.
4450.95
4596.38
4366.17
4455.36
4151.35
3727.41
4283.63
4527.76
4407.16
3946.67
4023.08
4221.36
2) Use the standard normal distribution or the t-distribution
to construct a 99% confidence interval for the population mean.
Justify your decision. If neither distribution can be used,
explain why. Interpret the results.
In a random sample of 11 mortgage institutions,...

Construct the indicated confidence interval for the population
mean using the? t-distribution. Assume the population is normally
distributed. c = 0.90?, x=14.4?, s=2.0?, n=10
The 90?% confidence interval using a? t-distribution is
(_,_)

We use the t distribution to construct a confidence
interval for the population mean when the underlying population
standard deviation is not known. Under the assumption that the
population is normally distributed, find
t??2,df for the following scenarios. Use Table
2. (Round your answers to 3 decimal places.)
t?/2,df
a. A 95% confidence
level and a sample of 8 observations.
b. A 90% confidence
level and a sample of 8 observations.
c. A 95% confidence
level and a...

Construct the indicated confidence interval for the population
mean mu using the t-distribution. Assume the population is
normally distributed. cequals0.90, x overbarequals13.9,
sequals3.0, nequals6 The 90% confidence interval using a
t-distribution is left parenthesis nothing comma nothing right
parenthesis.

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