Question

In an advertisement, a pizza shop claims its mean delivery time is 30 minutes. A consumer...

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.”)

Homework Answers

Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
In an advertisement, a pizza shop claims that its mean delivery time is less than 15...
In an advertisement, a pizza shop claims that its mean delivery time is less than 15 minutes.  A random selection of 16 delivery times has a sample mean of 14 minutes. It is known that the population is a normal distribution with standard deviation of delivery time is 2 minutes. Perform hypothesis test on the claim at α = 0.05.
In an advertisement, a pizza shop claims that the stabdard deviation of deliverh times is les...
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 7.32 minutes. To test...
A local pizza place claims that they average a delivery time of 7.32 minutes. To test this claim, you order 11 pizzas over the next 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...
A pizza place recently hired additional drivers and as a result now claims that its average...
A pizza place recently hired additional drivers and as a result now claims that its average delivery time for orders is under 45 minutes. A sample of 40 customer deliveries was​ examined, and the average delivery time was found to be 40.2 minutes.​ Historically, the standard deviation for delivery time is 10.5 minutes. Using alpha=0.01​, complete parts a and b below. a. Does this sample provide enough evidence to support the delivery time claim made by the pizza​ place? Determine...
A local hardware store claims that the mean waiting time in line is less than 3.7...
A local hardware store claims that the mean waiting time in line is less than 3.7 minutes. A random sample of 20 customers has a mean of 3.5 minutes with a standard deviation of 0.8 minute. If α = 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 frozen food between two...
A delivery company claims that the mean time it takes to deliver frozen food between two particular cities is 4 hours. A consumer advocacy group wishes to show at the 5% level that the mean time is greater than 4 hours. A random sample of 50 deliveries yielded a sample mean of 4.2 hours with a standard deviation of 0.5 hours. 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...
Question A local pizza parlor advertises that 80% of its deliveries arrive within 30 minutes of being ordered. A local resident is skeptical of the claim and decides to investigate. From 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 parlor’s claim is false? Identify the appropriate hypotheses, test statistic, p-value, and conclusion for...
The delivery time for a pizza company is approximately bell-shaped with a mean of 28.6 minutes...
The delivery time for a pizza company is approximately bell-shaped with a mean of 28.6 minutes with a standard deviation of 4.2 minutes. According to the Empirical Rule, what percent of deliveries should occur within 16 and 41.2 minutes?
A public bus company official claims that the mean waiting time for bus number 14 during...
A public bus company official claims that the mean waiting time for bus number 14 during peak hours is less than 10 minutes. Karen took bus number 14 during peak hours on 18 different occasions. Her mean waiting time was 7.9 minutes with sample standard deviation s = 1.5 minutes. At the 0.01 significance level, test the claim that the mean waiting time is less than 10 minutes. a) Write the null and alternative hypotheses. b) Determine the P-value. c)...
For the test of significance questions, clearly indicate each of the formal steps in the test...
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...