Question

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.

Answer #1

Question 2
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 σ 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.
(a) State the null and alternative hypotheses for the test. [3
marks]
(b) Calculate the value of the test statistic for this test....

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 claims that the mean lifetime of its fluorescent
bulbs is 1000 hours. A homeowner selects 25 bulbs and finds the
mean lifetime to be 980 hours with a standard deviation of 80
hours. If α = 0.05, test the manufacturer'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. 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 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.

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 σ is known to be 21.2 lb, use a 0.05 significance
level to test the claim that the population mean of all such
employees weights is less than 200 lb. Use the critical value
method.
Initial Claim:
Null Hypothesis:
Alternative Hypothesis
Test statistic (make sure you state which test statistic that
you are using):
Critical...

the health of employees in monitored by periodically
weighing them in. s sample of 54 employees has a mean weight of
183.9. assuming that a standard deviation is known to be 121.2
pounds. use a 0.10 significance level to test the claim that the
population mean of all such employees weights is less than 200
pounds

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. 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%.

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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,
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method.
A study was done on body temperatures of men and women. Here are
the sample statistics for the men: x1 = 97.55oF, s1 = 0.83oF, n1 =
11, and for the women: x2 = 97.31oF, s2 = 0.65oF, n2 = 59. Use a
0.06 significance level to test the claim that µ1 > µ2.

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