Question

The manager of a grocery store has taken a random sample of 100 customers. The average...

The manager of a grocery store has taken a random sample of 100 customers. The average length of time it took the customers in the sample to check out was 3.1 minutes. The population standard deviation is known at 0.5 minutes. We want to test to determine whether or not the mean waiting time of all customers is significantly different than 3 minutes. Use α = 0.05.

14. The test statistic is

a. 1.96

b. 1.64

c. 2.00

d. 0.056

15. The p-value is

a. 0.0456

b. 0.0482

c. 0.4772

d. 0.9759

e. 0.9772

16. At the 5% level, you

a. fail to reject the null hypothesis

b. reject the null hypothesis

17. Compute the probability of a Type II Error when µ = 2.8.

a. 0.0000

b. 0.0207

c. 0.4793

d. 0.9793

Math   Statistics-And-Probability   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

Dear student,
I am waiting for your feedback. I have given my 100% to solve your queries. If you are satisfied by my given answer. Can you please like it☺

0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
The manager of a grocery store has taken a random sample of 100 customers to determine...
The manager of a grocery store has taken a random sample of 100 customers to determine whether or not the mean waiting time of all customers is significantly more than 3 minutes. She observes that the average length of time it took the customers in the sample to check out was 3.1 minutes. The population standard deviation is known to be 0.5 minutes. USE INFORMATION TO ANSWER THE FOLLOWING: 1A. What is the appropriate test to use for this problem?...
The manager of a grocery store has taken a random sample of 100 customers. The average...
The manager of a grocery store has taken a random sample of 100 customers. The average length of time it took the customers in the sample to check out was 3.1 minutes. The population standard deviation is known to be 0.5 minute. We want to test to determine whether or not the mean waiting time of all customers is significantly more than 3 minutes. The test statistic is _____. a. 1.64 b. 2.00 c. 1.96 d. .056
The manager of a grocery store has taken a random sample of 100 customers. The average...
The manager of a grocery store has taken a random sample of 100 customers. The average length of time it took the customers in the sample to check out was 4.9 minutes with a sample standard deviation of 0.5 minutes. Conduct a test to determine whether or not the mean waiting time of all customers is significantly more than 5 minutes. Use a significance level of α = 0.01.
46.FOR NEXT 3 QUESTIONS USE THE FOLLOWING DIRECTION: Manager of a grocery store wants to test...
46.FOR NEXT 3 QUESTIONS USE THE FOLLOWING DIRECTION: Manager of a grocery store wants to test to determine whether the mean waiting time of its customers is significantly more than 4 minutes. He takes a random sample of 36 customers and finds that the average length of time it took the customers in the sample to check out was 4.6 minutes. A national study estimates that standard deviation of length of time of grocery store customers is 1.8 minutes. 47....
The manager of a grocery store has taken a random sample of 4 customers. The average...
The manager of a grocery store has taken a random sample of 4 customers. The average length of time it took the customers in the sample to check out was 6 minutes. The population standard deviation is known to be 0.1 minutes. We want to test to determine whether or not the mean waiting time of all customers is significantly more than 7 minutes. Use a significance level of (alpha = 0.01). Please show work.
2. The manager of a grocery store has taken a random sample of 100 customers. The...
2. The manager of a grocery store has taken a random sample of 100 customers. The average length of time it took the customers in the sample to check out was 3.1 minutes. The population mean is 3.5 minutes and the population standard deviation is known to be 0.5 minutes. We would like to know if there is evidence of a change in average check out time. Explain in the context of this question what a type 1 error would...
The manager of a grocery store has taken a random sample of 196 customers.
The manager of a grocery store has taken a random sample of 196 customers. The average length of time it took these 196 customers to check out was 3 minutes. It is known that the standard deviation of the population of checkout times is 1 minute. The margin of error is 0.140. Find the 95% confidence interval for the true average checkout time (in minutes).A. 1 to 5B. 2.86 to 3.14    C. 2.883 to 3.117D. 2.990 to 3.010
***Please include bell shaped curve. Zingo's Grocery store claims that customers spend an average of 5...
***Please include bell shaped curve. Zingo's Grocery store claims that customers spend an average of 5 minutes waiting for service at the stores deli counter. A random sample of 40 customers was timed at the deli counter, and the average service time was found to be 5.85 minutes. Historically the standard deviation for waiting time is 1.75 minutes per customer. a. Find the 95% confidence interval for the mean time that customers wait at the deli counter. b. Is there...
A bank calculated the waiting time (to be served) for a random sample of 18 customers...
A bank calculated the waiting time (to be served) for a random sample of 18 customers one day. The mean waiting time for the sample was 3.1 minutes and the standard deviation of the waiting times was 1.3 minutes. The bank is aiming for wait times less than 4 minutes. For the test with hypotheses H0:μ= 4 vs Ha:μ <4, the P-value is 0.0046.19. Part 1: Circle Yes or No if this hypothesis test is significant at the following levels:...
You randomly sample 100 Publix customers. On average, it took these customers 3 minutes to check...
You randomly sample 100 Publix customers. On average, it took these customers 3 minutes to check out. It is known that the standard deviation of the checkout time is one minute. The sample mean will provide a margin of error of ____ if you use an alpha of .05. a .196 b 0.10 c 1.96 d 2.08
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT