Question

Identify the null hypothesis, alternative hypothesis, test statistic, P-value, conclusion about the null hypothesis, and final conclusion that addresses the original claim. A survey of 1025 adults found that 113 of them, or 11%, said they or a household member had been a victim of a computer or internet crime on their home computer in the past year. At the 0.05 level of significance, test the claim that the rate of internet crime victims is less than 12%.

Answer #1

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Identify the null hypothesis, alternative hypothesis, test
statistic, P-value, conclusion about the null hypothesis, and final
conclusion that addresses the original claim. Assume that you plan
to use a significance level of ? = 0.05 to test the claim that ?1 =
?2. A report on the nightly news broadcast stated that 10 out of
145 households with pet dogs were burglarized and 23 out of 187
without pet dogs were burglarized.

Identify the null hypothesis, alternative hypothesis, test
statistic, P-value, conclusion about the null hypothesis, and final
conclusion that addresses the original claim. Test the claim that
the mean lifetime of car engines of a particular type is greater
than 220,000 miles. Sample data are summarized as n = 23, ?̅ =
226,450 miles, and s = 11,500 miles. Use a significance level of ?
= 0.01.

Identify the null hypothesis, alternative hypothesis,
test statistic, P-value, conclusion about the null hypothesis, and
final conclusion that addresses the original claim.
A manufacturer considers his production process to be out of
control when defects exceed 3%. In a random sample of 85 items, the
defect rate is 5.9% but the manager claims that this is only a
sample fluctuation and production is not really out of control. At
the 0.01 level of significance, test the manager's claim.

Identify the null hypothesis, alternative hypothesis, test
statistic, P-value, conclusion about the null hypothesis, and final
conclusion that addresses the original claim. The health of
employees is monitored by periodically weighing them in. A sample
of 54 employees has a mean weight of 183.9 lb. Assuming that ? is
known to be 121.2 lb, use a 0.10 significance level to test the
claim that the population mean of all such employees weights is
less than 200 lb.

Identify the null hypothesis, alternative hypothesis,
test statistic, P-value, conclusion about the null hypothesis, and
final conclusion that addresses the original claim. Use the P-value
method.
A simple random sample of 55 adults is obtained from a normally
distributed population, and each person’s red blood cell count (in
cells per microliter) is measured. The sample mean is 5.26 and the
sample standard deviation is 0.54. Use α = .07 to test the claim
that the sample is from a population...

5) Identify the null hypothesis, alternative hypothesis, test
statistic, critical value(s), conclusion about the null hypothesis,
and final conclusion that addresses the original claim.
In a 3M Privacy Filters poll, 806 adults were asked to identify
their favorite seat when they fly, and 492 of them chose a window
seat. Use 0.01 significance level to test the claim that 62% of
adults prefer window seats when they fly.

Identify the null and alternative hypothesis(in symbolic and
sentence form), test statistic, P-value(or critical values),
conclusion about the null hypothesis, and final conclusion that
addresses the original claim (Don’t just say Reject the null
hypothesis or fail to reject the null hypothesis).
4. Test the claim that the mean age of the prison population in
one city is less than 26 years. Sample data are summarized as
n=25,x ̅=24.4,and s=9.2. Use a significance level of α=0.05.

Identify the null hypothesis, alternative hypothesis,
test statistic, P-value, conclusion about the null hypothesis, and
final conclusion that addresses the original claim. Use the P-value
method.
In a study of treatments for very painful “cluster headaches”,
144 patients were treated with oxygen and 154 other patients were
given a placebo consisting of ordinary air. Among the 144 patients
in the oxygen treatment group, 116 were free from headaches 15
minutes after treatment. Among the 154 patients given the placebo,
33...

Identify the null and alternative hypothesis(in symbolic and
sentence form), test statistic, P-value(or critical values),
conclusion about the null hypothesis, and final conclusion that
addresses the original claim (Don’t just say Reject the null
hypothesis or fail to reject the null hypothesis).
3. Test the claim that for the population of female college
students, the mean weight is given by μ=132 lb Sample data are
summarized as n=20,x ̅=137lb and s=14.2. Use a significance level
of α=0.10.

Identify -
• Null & alternative hypothesis
• Test statistic
• P-value
• Conclusion about null hypothesis
• Layman’s final conclusion that addresses the original
claim
Dora recently explored southeast Australia where she found some
very large trees known as Eucalyptus regnans or Mountain Ash. She
wondered if they were taller, on average, than the costal Douglas
Firs of her native state of Oregon in the United States, which have
an average height of 250 feet in old growth areas....

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