Question

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 0: ▼ sigma x over bar mu p ▼ less than not equals greater than equals nothing

Upper H 1: ▼ sigma mu p x over bar ▼ greater than not equals less than equals nothing

(Type integers or decimals. Do not round.)

Construct a 95% confidence interval about the mean age. The lower bound is nothing. The upper bound is nothing.

(Round to two decimal places as needed.) What does the interval imply?

A. Since the mean age from the earlier year is not contained in the interval, there is sufficient evidence to conclude that the mean age had changed

B. Since the mean age from the earlier year is contained in the interval, there is sufficient evidence to conclude that the mean age had changed.

C. Since the mean age from the earlier year is not contained in the interval, there is not sufficient evidence to conclude that the mean age had changed.

D. Since the mean age from the earlier year is contained in the interval, there is not sufficient evidence to conclude that the mean age had changed.

Answer #1

x̅ = 39.5

s = 8.6

n = 32

Null and Alternative hypothesis:

Ho : µ = 40.5

H1 : µ ≠ 40.5

95% Confidence interval :

At α = 0.05 and df = n-1 = 31, two tailed critical value, t-crit = T.INV.2T(0.05, 31) = 2.040

Lower Bound = x̅ - t-crit*s/√n = 39.5 - 2.04 * 8.6/√32 =
**36.40**

Upper Bound = x̅ + t-crit*s/√n = 39.5 + 2.04 * 8.6/√32 =
**42.60**

**36.40 < µ < 42.60**

**Answer : D. Since the mean age from the earlier year is
contained in the interval, there is not sufficient evidence to
conclude that the mean age had changed.**

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 40.8
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
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
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?

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. ?(
,...

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...

In a previous year, 51% of females aged 15 and older lived
alone. A sociologist tests whether this percentage is different
today by conducting a random sample of 550 females aged 15 and
older and finds that 287 are living alone. Is there sufficient
evidence at the alphaequals0.01 level of significance to conclude
the proportion has changed? Because np 0 left parenthesis 1 minus
p 0 right parenthesisequals nothing ▼ greater than less than not
equals equals 10, the sample...

ADVERTISEMENT

Get Answers For Free

Most questions answered within 1 hours.

ADVERTISEMENT

asked 11 minutes ago

asked 13 minutes ago

asked 24 minutes ago

asked 26 minutes ago

asked 29 minutes ago

asked 29 minutes ago

asked 37 minutes ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago