Question

One year, the mean age of an inmate on death row was 40.8 years. A sociologist wondered whether the mean age of a death-row inmate has changed since then. She randomly selects 32 death-row inmates and finds that their mean age is 40.3 with a standard deviation of 9.9 Construct a 95% confidence interval about the mean age. What does the interval imply?

Construct the correct hypthesis

A) H0 mu ___ ____

B) H1 mu ___ _____

C) Construct a 95% confidence interval about the mean age

upper bound:

lower bound:

D) What does the interval imply? Is there sufficient evidence?

Answer #1

One? year, the mean age of an inmate on death row was
41.241.2
years. A sociologist wondered whether the mean age of a?
death-row inmate has changed since then. She randomly selects
3232
?death-row inmates and finds that their mean age is
40.440.4?,
with a standard deviation of
9.29.2.
Construct a? 95% confidence interval about the mean age. What
does the interval? imply?

One year, the mean age of an inmate on death row was 40.7
years. A sociologist wondered whether the mean age of a death-row
inmate has changed since then. She randomly selects 32 death-row
inmates and finds that their mean age is 38.9 , with a standard
deviation of 8.5 . Construct a 95% confidence interval about the
mean age. What does the interval imply?

One year, the mean age of an inmate on death row was 39.9
years. A sociologist wondered whether the mean age of a death-row
inmate has changed since then. She randomly selects 32 death-row
inmates and finds that their mean age is 38.3,with a standard
deviation of 8.1. Construct a 95% confidence interval about the
mean age. What does the interval imply?
A) Choose the correct hypotheses.
B) Construct a 95% confidence interval about the mean age.
The lower bound...

One year, the mean age of an inmate on death row was 40.5
years. A sociologist wondered whether the mean age of a death-row
inmate has changed since then. She randomly selects 32 death-row
inmates and finds that their mean age is 39.5, with a standard
deviation of 8.6. Construct a 95% confidence interval about the
mean age. What does the interval imply? LOADING... Click the icon
to view the table of critical t-values. Choose the correct
hypotheses.
Upper H...

Several years? ago, the reported mean age of an inmate on death
row was 44.2 years. A sociologist wondered whether the mean age of
a? death-row inmate has changed since then. She randomly selects 40
?death-row inmates and finds that their mean age is 42.4?, with a
standard deviation of 8.6. Construct a 95?% confidence interval
about the mean age of death row inmates. What does the interval?
imply? Construct a 95?% confidence interval about the mean age. ?(
,...

One year, the mean age of an inmate on death row was
38.938.9
years. A sociologist wondered whether the mean age of a
death-row inmate has changed since then. She randomly selects
3232
death-row inmates and finds that their mean age is
37.837.8,
with a standard deviation of
8.18.1.
Construct a 95% confidence interval about the mean age. What
does the interval imply?
LOADING...
Click the icon to view the table of critical t-values.
Choose the correct hypotheses.
Upper H...

In 2002, the mean age of an inmate on death row was 40.7 years,
according to data obtained from
the U.S. Department of Justice. A sociologist wants to test the
claim that the mean age of a death row inmate
has changed since then. She randomly selects 32 death-row inmates
and finds that their mean age is 37.9, with a
standard deviation of 9.6. Test the sociologist’s claim using a 1%
level of significance.

In 2002, the mean age of an inmate on death row was 40.7 years,
according to data obtained from
the U.S. Department of Justice. A sociologist wants to test the
claim that the mean age of a death row inmate
has changed since then. She randomly selects 32 death-row inmates
and finds that their mean age is 37.9, with a
standard deviation of 9.6. Test the sociologist’s claim using a 1%
level of significance.

In 2002, the mean age of an inmate on death row was 40.7 years,
according to data obtained from the U.S. Department of Justice. A
sociologist wondered whether the mean age of a death-row inmate has
changed since then. She randomly selects 34 death-row inmates and
finds that their mean age is 38.5, with a standard deviation of
10.2. Does this data indicate that the mean age of
death-row inmates has changed significantly since 2002. Use the α =
0.05 level...

A simple random sample of size n is drawn. The sample mean, x
overbar, is found to be 17.6, and the sample standard deviation,
s, is found to be 4.1. LOADING... Click the icon to view the table
of areas under the t-distribution. (a) Construct a 95%
confidence interval about mu if the sample size, n, is 35. Lower
bound: nothing; Upper bound: nothing (Use ascending order. Round
to two decimal places as needed.) (b) Construct a 95% confidence
interval...

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