The waiting time to get food at a fast-food restaurant is 4.7 minutes on average with a standard deviation of 2.5 minutes. Suppose that a sample of 32 customers is randomly selected.A. What are the mean and standard deviation of the sample mean waiting time of 32 customers?Mean = ____ minutesStandard Deviation (standard error of the mean)= ____ minutes Round standard error to 5 decimal places.B. What is the probability that the average waiting time of 32 customers is less than 4.4 minutes?Answer: ____ Round to 4 decimal places.C. What is the probability that the average waiting time of 32 customers is greater than 4.8 minutes?Answer: ____ Round to 4 decimal places.D. What is the probability that the average waiting time of 32 customers is between 4.4 and 4.8 minutes?Answer: ____ Round to 4 decimal places.

Answered: Image /qna-images/answer/e3d61c81-63bb-4975-aa37-b1c6afbda036.jpg

Answered: The waiting time to get food at a…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Similar questions

A division-wide aptitude test was conducted on 10 000 pupils. the mean of the test is 58 and standard deviation of 17. The scores also approximate the normal distribution. about how many pupils have score between 58 and 94?
Assume that people playing World of Warcraft in a week has a normal distribution with a mean of 54 hours and a standard deviation of 11 hours. Find the probability that a randomly selected person played more than 89 hours. Round to four decimals places.
The local police force gives all applicants an entrance exam and accepts only those applicants who score on the top 15% on this test. If the mean score this year is 87 and the standard deviation is 8, would an individual with a score of 110 be accepted?
Imagine a scenario where 100 people complete a self-esteem measure. Assume the standard deviation of their true scores is 24.05 and the variance of the random errors associated with responses is 418.89. What is the reliablity of these scores?
Furnace repair bills are normally distributed with a mean of 267 dollars and a standard deviation of 20 dollars. If 64 of these repair bills are randomly selected, find the probability that they have a mean cost between 267 dollars and 269 dollars.
The sample mean and sample standard deviation of all San Francisco student scores on the most recent Scholastic Aptitude Test examination in mathematics were 517 and 120. Approximate the probability that a random sample of 144 students would have an average score exceeding a. 507; b. 517; c. 537; d. 550.
The standard deviation of the lengths of a hospital stay on the intervention ward is 8.7 days. What is the probability that the sampling error made in estimating the population mean length of stay by the mean length of stay of a sample of 73 patients will be at most 2 days
Assume that adults have IQ scores that are normally distributed with a mean of 97.9 and a standard deviation of 24.8. Find the probability that a randomly selected adult has an IQ greater than 135.8. The probability that a randomly selected adult from this group has an IQ greater than 135.8 is?
The average score of all pro golfers for a particular course has a mean of 70 and a standard deviation of 30. Suppose 36 golfers played the course today. Find the probability that the average score of the 36 golfers exceeded 71
Assume that the time a student stays in school is normally distributed with a mean of 5 hours and a standard deviation of 0.5 hours. Every day, Ian stays in school for 5.5 hours. What proportion of student stays less than 5.5 hours?
The probability that a patient recovers from a rare blood disease is 0.4. If 15 people are known to have contracted this disease, find the mean and standard deviation of the number of recoveries among 15 patients.
If a raw score is 28 in a distribution in which the mean is 20 and the standard deviation is 2, what is the z score that corresponds with the raw score of 28?

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