Question

In an advertisement, a pizza shop claims its mean delivery time is 30 minutes. A consumer group believes that the mean delivery time is greater than the pizza shop claims. A random sample of 41 delivery times has a mean of 31.5 minutes with standard deviation of 3.5 minutes. Does this indicate at a 5% significance level that the mean delivery time is longer than what the pizza shop claims?

Step 1: State the null and alternative hypothesis.

Step 2: Calculate the test statistic.

Step 3: Find the *p*-value.

Step 4: State your conclusion in the context of the problem.

(Do not just say “Reject H0” or “Do not reject H0.”)

Answer #1

In an advertisement, a pizza shop claims that its mean delivery
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delivery times has a sample mean of 14 minutes. It is known that
the population is a normal distribution with standard deviation of
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α = 0.05.

In
an advertisement, a pizza shop claims that the stabdard deviation
of deliverh times is les than 3.25 minutes. A random selection of
38 delivery times has a sample mean of 28.5 minutes and a standard
deviation of 3.5 minutes. Use a significance level of .01 to test
the pizza ship’s claim.

A local pizza place claims that they average a delivery time of
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month at random times on random days of the week. You calculate the
average delivery time and sample standard deviation from the 11
delivery times (minutes), and with the sample mean and sample
standard deviation of the time (minutes), you create a 95%
confidence interval of (7.648, 9.992). (delivery time is normally
distributed)
a. What...

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alpha=0.01, complete parts a and b below. a. Does this sample
provide enough evidence to support the delivery time claim made by
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A local hardware store claims that the mean waiting time in line
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0.05, test the bank's claim.
Null:
Alternative:
T=
p-Value=
Choose one: Reject or Fail to Reject
Conclusion in Context:

A delivery company claims that the mean time it takes to deliver
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1. Set up the null and alternative hypotheses.
2. Compute the test statistic.
3. State the p-value for the...

Question A local pizza parlor advertises that 80% of its
deliveries arrive within 30 minutes of being ordered. A local
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a random sample of 50 of the parlor’s deliveries, he finds that 14
take longer than 30 minutes to arrive. At the 10% level of
significance, does the resident have evidence to conclude that the
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statistic, p-value, and conclusion for...

The delivery time for a pizza company is approximately
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A public bus company official claims that the mean waiting time
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a) Write the null and alternative hypotheses.
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c)...

For the test of significance questions, clearly indicate each of
the formal steps in the test of significance.
Step 1: State the null and alternative hypothesis.
Step 2: Calculate the test statistic.
Step 3: Find the p-value.
Step 4: State your conclusion. (Do not just say “Reject H0” or
“Do not reject H0”, state the conclusion in the context of the
problem.)
A coffee shop claims that its fresh-brewed drinks have a mean
caffeine content of 80 milligrams per 5...

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