While checking receipts at Reds, it was determined that the average amount spent on foodtable was $21.50 with a standard deviation of $2.22. If we can assume that the amount ofpermoney spent was Normally distributed, what is the probability that the average of 8 checksis between $20 and $23?

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Answered: While checking receipts at Reds, it was…

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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Jessica knows that the average profit of manufacturing plants nationwide each year is $100,000 with a standard deviation of $16,000. The distribution is known to be right skewed. She takes a sample of 35 plants from her state, what is the probability that the mean annual profit for plants in her sample is less than $95,000?
Suppose the mean income of firms in the industry for a year is $25 million with a standard deviation of $9 million. If incomes for the industry are distributed normally, what is the probability that a randomly selected firm will earn less than $34 million? Round your answer to four decimal places
The Greenville Power Authority states that the mean monthly energy bill for their customers is $228 with a standard deviation of $38. They know that energy bills follow a normal distribution. a. Between what two values do we expect 99.7% of energy bill’s to fall? b. What is the probability of a randomly selected energy bill at least $190?
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One year, the distribution of salaries for professional sports players had a mean of $1.6 million and a standard deviation of $0.7 million. Suppose a sample of 100 major league players was taken. Find the approximate probability that the average salary of the 100 players that year exceeds $1.1 million.
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The Aluminum Association reports that the average American uses 56.8 pounds of aluminum in a year. A random sample of 50 households is monitored for one year to determine aluminum usage. If the population standard deviation of annual usage is 12.3 pounds, what is the probability that the sample mean will be each of the following? Appendix A Statistical Tables d. Less than 55 poundse. Less than 49 pounds
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The Aluminum Association reports that the average American uses 56.8 pounds of aluminum in a year. A random sample of 50 households is monitored for one year to determine aluminum usage. If the population standard deviation of annual usage is 12.3 pounds, what is the probability that the sample mean will be each of the following? Appendix A Statistical Tables a. More than 60 poundsb. More than 56 poundsc. Between 55 and 57 pounds

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While checking receipts at Reds, it was determined that the average amount spent on food per table was $21.50 with a standard deviation of $2.22. If we can assume that the amount of money spent was Normally distributed, what is the probability that the average of 8 checks is between $20 and $23?