Question

A customer service phone line claims that the wait times before a call is answered by a service representative is less than 3.3 minutes. In a random sample of 62 calls, the average wait time before a representative answers is 3.26 minutes. The population standard deviation is assumed to be 0.14 minutes. Can the claim be supported at α=0.08?

*Homework Help:*

6VE. Second sample hypothesis testing from word problem to implications for claim, with test statistic (Links to an external site.) (3:26)

Group of answer choices

No, since test statistic is in the rejection region defined by the critical value, reject the null. The claim is the alternative, so the claim is not supported

Yes, since test statistic is in the rejection region defined by the critical value, reject the null. The claim is the alternative, so the claim is supported

Yes, since test statistic is not in the rejection region defined by the critical value, reject the null. The claim is the alternative, so the claim is supported

No, since test statistic is not in the rejection region defined by the critical value, reject the null. The claim is the alternative, so the claim is not supported

Answer #1

So the conclusion is

Yes , since the test statistic is in the rejection region defined by the critical value , Reject the Null. The claim is the alternative. So the claim is supported .

(CO7) A state Department of Transportation claims that the mean
wait time for various services at its different location is less
than 6 minutes. A random sample of 16 services at different
locations has a mean wait time of 9.5 minutes and a standard
deviation of 7.3 minutes. At α=0.05, can the department’s claim be
supported assuming the population is normally distributed?
No, since p of 0.037 is less than 0.05, reject the null. Claim
is null, so is not...

A business receives supplies of copper tubing where the supplier
has said that the average length is 26.70 inches so that they will
fit into the business’ machines. A random sample of 48 copper tubes
finds they have an average length of 26.75 inches. The population
standard deviation is assumed to be 0.15 inches. At α=0.05, should
the business reject the supplier’s claim?
Yes, since p<α, we reject the null and the null is the
claim
No, since p>α, we...

1.
(CO 7) A travel analyst claims that the mean room rates at a
three-star hotel in Chicago is greater than $152. In a random
sample of 36 three-star hotel rooms in Chicago, the mean room rate
is $163 with a standard deviation of $41. At α=0.10, what type of
test is this and can you support the analyst’s claim using the
p-value?
Claim is the alternative, fail to reject the null as p-value
(0.054) is less than alpha (0.10),...

A university claims that the mean time professors are in their
offices for students is at least 6.5 hours each week. A random
sample of eight professors finds that the mean time in their
offices is 6.2 hours each week. With a sample standard deviation of
0.49 hours from a normally distributed data set, can the
university’s claim be supported at α=0.05?
A. Yes, since the test statistic is not in the rejection region
defined by the critical value, the...

A car company claims that the mean gas mileage for its luxury
sedan is at least 24 miles per gallon. A random sample of 7 cars
has a mean gas mileage of 23 miles per gallon and a standard
deviation of 2.4 miles per gallon. At α=0.05, can you support the
company’s claim assuming the population is normally distributed?
Yes, since the test statistic is not in the rejection region
defined by the critical value, the null is not rejected....

A credit reporting agency claims that the mean credit card debt
in a town is greater than $3500. A random sample of the credit card
debt of 20 residents in that town has a mean credit card debt of
$3619 and a standard deviation of $391. At α=0.10, can the credit
agency’s claim be supported?
Yes, since p-value of 0.19 is greater than 0.10, fail to reject
the null. Claim is null, so is supported
No, since p-value of 0.09...

A car company claims that its cars achieve an average gas
mileage of at least 26 miles per gallon. A random sample of eight
cars form this company have an average gas mileage of 25.2 miles
per gallon and a standard deviation of 1 mile per gallon. At
α=0.06, can the company’s claim be supported, assuming this is a
normally distributed data set?
a) No, since the test statistic of -2.26 is in the rejection
region defined by the critical...

I appreciate you taking the time to answer my question today,
please answer as many as you can, thank you.
Question 26 2 pts
(CO7) A travel analyst claims that the mean room rates at a
three-star hotel in Chicago is greater than $152. In a random
sample of 36 three-star hotel rooms in Chicago, the mean room rate
is $160 with a standard deviation of $41. At α=0.10, what type of
test is this and can you support the...

16. In a hypothesis test, the claim is μ≤28 while the sample of
29 has a mean of 41 and a standard deviation of 5.9. In this
hypothesis test, would a z test statistic be used or a t test
statistic and why?
z test statistic would be used as the mean is less than than
30
t test statistic would be used as the sample size is less than
30
t test statistic would be used as the standard...

(CO 5) A state Department of Transportation claims that the mean
wait time for various services at its different location is more
than 6 minutes. A random sample of 16 services at different
locations has a mean wait time of 9.5 minutes and a standard
deviation of 7.3 minutes. At α=0.01, can the department’s claim be
supported assuming the population is normally distributed? Group of
answer choices
No, since p of 0.037 is greater than 0.01, fail to reject the...

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