Question

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. ?( , ?) ?(Use ascending order. Round to two decimal places as? needed.)

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 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...

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
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...

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...

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...

Several years ago, the mean height of women 20 years of age or
older was 63.7 inches. Suppose that a random sample of 45 women who
are 20 years of age or older today results in a mean height of 64.2
inches.
(a) State the appropriate null and alternative hypotheses to
assess whether women are taller today.
(b) Suppose the P-value for this test is 0.11. Explain what
this value represents.
(c) Write a conclusion for this...

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