Question

In a survey, 500 men and 500 women were randomly selected. Among the men, 52 had been ticketed for speeding within the last year, whereas 27 of the women had been ticketed for speeding during the same period (based on data from R. H. Bruskin Associates).

(a) At the 0.01 significance level, test the claim that women have lower rate of speeding tickets.

Original claim is made by the Answer hypothesis.

Original claim is: p_{women} - p_{men}Answer
0.

Test statistic: Answer

Critical value: Answer

P-value: Answer

Initial conclusion: We Answer the null hypothesis.

Final conclusion: There Answer enough evidence to support the
claim.

(b) Construct a 98% confidence interval for the difference between
the two proportions.

Answer< p_{women} - p_{men}<Answer

Answer #1

To test the effectiveness of a lesson, a teacher gives randomly
selected students a pretest and follow-up test. The results are
given below.
Student
A
B
C
D
E
F
G
H
Before
6
8
5
4
3
5
4
7
After
9
10
8
7
6
8
7
10
(a) At the 0.025 significance level, test the claim that the
lesson was effective.
Original claim is made by Answer hypothesis.
Original claim is: ud Answer 0.
Test statistic: Answer...

A survey of 500 randomly chosen adults found that
20% of the 300 men and 14% of the 200 women had purchased books
online.
You are to test the hypothesis that online rates are the same for
men and women.
What is the p-value of your test of significance?

In a study of red/green color blindness, 600 men and 2000 women
are randomly selected and tested. Among the men, 52 have red/green
color blindness. Among the women, 5 have red/green color blindness.
Test the claim that men have a higher rate of red/green color
blindness.
(Note: Type ‘‘p_m′′‘ for the symbol pm , for example p_m
not=p_w for the proportions are not equal,
p_m>p_w for the proportion of men with color
blindness is larger, p_m<p_w, for the
proportion of...

In a study of red/green color blindness, 700 men and 2850 women
are randomly selected and tested. Among the men, 61 have red/green
color blindness. Among the women, 7 have red/green color blindness.
Test the claim that men have a higher rate of red/green color
blindness. (Note: Type ‘‘p_m″ for the symbol pm , for example
p_mnot=p_w for the proportions are not equal, p_m>p_w for the
proportion of men with color blindness is larger, p_m)
(a) State the null hypothesis:...

In a study of
red/green color blindness, 950 men and 2550 women are randomly
selected and tested. Among the men, 85 have red/green color
blindness. Among the women, 7 have red/green color blindness. Test
the claim that men have a higher rate of red/green color
blindness.
(Note: Type ‘‘p_m′′‘‘p_m″ for the symbol
pmpm , for example
p_mnot=p_wp_mnot=p_w
for the proportions are not equal,
p_m>p_wp_m>p_w
for the proportion of men with color blindness is larger,
p_m<p_wp_m<p_w
, for the proportion of...

In a study of
red/green color blindness, 700 men and 2500 women are randomly
selected and tested. Among the men, 63 have red/green color
blindness. Among the women, 7 have red/green color blindness. Test
the claim that men have a higher rate of red/green color
blindness.
(Note: Type ‘‘p_m′′‘‘p_m″ for the symbol
pmpm , for example
p_mnot=p_wp_mnot=p_w
for the proportions are not equal,
p_m>p_wp_m>p_w
for the proportion of men with color blindness is larger,
p_m<p_wp_m<p_w
, for the proportion of...

In a study of red/green color blindness, 950 men and 2700 women
are randomly selected and tested. Among the men, 90 have red/green
color blindness. Among the women, 7 have red/green color blindness.
Test the claim that men have a higher rate of red/green color
blindness. (Note: Type ‘‘p_m" for the symbol pm , for example
p_mnot=p_w for the proportions are not equal, p_m>p_w for the
proportion of men with color blindness is larger, p_m
The test statistic is:
Construct...

A study of randomly selected Americans found that of 1,792 men,
244 had cardiovascular disease (CVD) and of 2,007 women, CVD was
prevalent in 135 of them. Conduct a hypothesis
test to see if CVD prevalence is higher among men than
women in America.
Let men be group 1 and women be group 2.
1.Write the hypotheses for this test.
2.What is the test statistic?
3.What is the p-value?
4.Using α = 0.05, decide whether or not to reject the...

Are women more likely than men to practice vegetarianism?
Students in three statistics classes were randomly selected and
asked whether they had ever been vegetarians and here are the
results of that survey:
vegetarian not vegetarian
women 19 45
men 11 31
a) Find the numbers of women and men (x) who say they are now or
were once vegetarians, and also the total number of women and men
each sample.
xw = nw =
xm = nm =
b)...

The table below summarizes data from a survey of a sample of
women. Using a 0.05 significance level, and assuming that the
sample sizes of 900 men and 300 women are predetermined, test the
claim that the proportions of agree/disagree responses are the
same for subjects interviewed by men and the subjects interviewed
by women. Does it appear that the gender of the interviewer
affected the responses of women?
Man
Woman
Women who agree
581
244
Women who disagree
319...

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