The waiting time to get food at a fast-food restaurant is 4.5 minutes on average with standard deviation of 2 munutes. Suppose that a sample of 45 customers is randoml selected. A. What are the mean and standard deviation of the sample mean waiting time of 45 customers? Mean = 4.5 Standard Deviation (standard error of the mean) = 0.29814 minutes Round standard error to 5 decimal places. B. What is the probability that the average waiting time of 45 customers is less than 4.3 minutes? Round to 4 decimal places. Answer: minutes C. What is the probability that the average waiting time of 45 customers is greater than 4.7 minutes? Round to 4 decimal places. D. What is the probability that the average waiting time of 45 customers is between 4.3 and 4.7 minutes? Round to 4 decimal places. Answer: Answer:
The waiting time to get food at a fast-food restaurant is 4.5 minutes on average with standard deviation of 2 munutes. Suppose that a sample of 45 customers is randoml selected. A. What are the mean and standard deviation of the sample mean waiting time of 45 customers? Mean = 4.5 Standard Deviation (standard error of the mean) = 0.29814 minutes Round standard error to 5 decimal places. B. What is the probability that the average waiting time of 45 customers is less than 4.3 minutes? Round to 4 decimal places. Answer: minutes C. What is the probability that the average waiting time of 45 customers is greater than 4.7 minutes? Round to 4 decimal places. D. What is the probability that the average waiting time of 45 customers is between 4.3 and 4.7 minutes? Round to 4 decimal places. Answer: Answer:
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.3: Measures Of Spread
Problem 26PFA
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I need help with the last three parts. I am not allowed to use Excel or a Ti-84 calculator. I need to work these by hand, however, I cannot figure them out.
![The waiting time to get food at a fast-food restaurant is 4.5 minutes on average with standard deviation of 2 munutes. Suppose that a sample of 45 customers is randomly
selected.
A. What are the mean and standard deviation of the sample mean waiting time of 45 customers?
Mean: =
Standard Deviation (standard error of the mean)
4.5
= 0.29814
minutes Round standard error to 5 decimal places.
B. What is the probability that the average waiting time of 45 customers is less than 4.3 minutes?
Round to 4 decimal places.
C. What is the probability that the average waiting time of 45 customers is greater than 4.7 minutes?
Round to 4 decimal places.
D. What is the probability that the average waiting time of 45 customers is between 4.3 and 4.7 minutes?
Round to 4 decimal places.
Answer:
Answer:
minutes
Answer:](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fc600bac0-8234-41a0-b9a1-34feb1be3866%2F07ba638f-5dff-4c7e-95b5-5eb7bc9a9dc4%2Fkyruwlh_processed.png&w=3840&q=75)
Transcribed Image Text:The waiting time to get food at a fast-food restaurant is 4.5 minutes on average with standard deviation of 2 munutes. Suppose that a sample of 45 customers is randomly
selected.
A. What are the mean and standard deviation of the sample mean waiting time of 45 customers?
Mean: =
Standard Deviation (standard error of the mean)
4.5
= 0.29814
minutes Round standard error to 5 decimal places.
B. What is the probability that the average waiting time of 45 customers is less than 4.3 minutes?
Round to 4 decimal places.
C. What is the probability that the average waiting time of 45 customers is greater than 4.7 minutes?
Round to 4 decimal places.
D. What is the probability that the average waiting time of 45 customers is between 4.3 and 4.7 minutes?
Round to 4 decimal places.
Answer:
Answer:
minutes
Answer:
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