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:
A First Course in Probability (10th Edition)
10th Edition
ISBN:9780134753119
Author:Sheldon Ross
Publisher:Sheldon Ross
Chapter1: Combinatorial Analysis
Section: Chapter Questions
Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...
Related questions
Question
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.
Transcribed Image Text:**Educational Resource: Analyzing Waiting Times at Fast-Food Restaurants**
The waiting time to get food at a fast-food restaurant is 4.5 minutes on average with a standard deviation of 2 minutes. 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 =** 4.5 minutes
- **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?**
- **Answer:** *Provide the answer rounded to 4 decimal places.*
**C. What is the probability that the average waiting time of 45 customers is greater than 4.7 minutes?**
- **Answer:** *Provide the answer rounded 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?**
- **Answer:** *Provide the answer rounded to 4 decimal places.*
Expert Solution
This question has been solved!
Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.
This is a popular solution!
Trending now
This is a popular solution!
Step by step
Solved in 4 steps with 8 images
Recommended textbooks for you
A First Course in Probability (10th Edition)
Probability
ISBN:
9780134753119
Author:
Sheldon Ross
Publisher:
PEARSON
A First Course in Probability (10th Edition)
Probability
ISBN:
9780134753119
Author:
Sheldon Ross
Publisher:
PEARSON