4-82. Phoenix water is provided to approximately 1.5 million people who are served through more than 370,000 accounts (http:// phoenix.gov/WATER/wtrfacts.html). All accounts are metered and billed monthly. The probability that an account has an error in a month is 0.001, and accounts can be assumed to be independent. (a) What are the mean and standard deviation of the number of account errors each month? (b) Approximate the probability of fewer than 350 errors in a month. (c) Approximate a value so that the probability that the number of errors exceeds this value is 0.05. (d) Approximate the probability of more than 400 errors per month in the next two months. Assume that results between months are independent.

4-82. Phoenix water is provided to approximately 1.5 million people who are served through more than 370,000 accounts (http:// phoenix.gov/WATER/wtrfacts.html). All accounts are metered and billed monthly. The probability that an account has an error in a month is 0.001, and accounts can be assumed to be independent. (a) What are the mean and standard deviation of the number of account errors each month? (b) Approximate the probability of fewer than 350 errors in a month. (c) Approximate a value so that the probability that the number of errors exceeds this value is 0.05. (d) Approximate the probability of more than 400 errors per month in the next two months. Assume that results between months are independent.

Name: Q.4-82 probabilities(a) More than 23 chips are defective.(b) Between 2
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Description: Q.4-82 probabilities(a) More than 23 chips are defective.(b) Between 20 and 30 chips are defective.bas4-81. There were 49.7 million people with some type of long-lasting condition or disability living in the United States in2000. This represented 19.

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

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Concept explainers

Contingency Table

A contingency table can be defined as the visual representation of the relationship between two or more categorical variables that can be evaluated and registered. It is a categorical version of the scatterplot, which is used to investigate the linear relationship between two variables. A contingency table is indeed a type of frequency distribution table that displays two variables at the same time.

Binomial Distribution

Binomial is an algebraic expression of the sum or the difference of two terms. Before knowing about binomial distribution, we must know about the binomial theorem.

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Q.4-82

probabilities
(a) More than 23 chips are defective.
(b) Between 20 and 30 chips are defective.
bas
4-81. There were 49.7 million people with some type of long-
lasting condition or disability living in the United States in
2000. This represented 19.3 percent of the majority of civilians
aged five and over (http://factfinder.census.gov). A sample of
1000 persons is selected at random.
(a) Approximate the probability that more than 200 persons in
the sample have a disability.
(b) Approximate the probability that between 170 and 320
people in the sample have a disability.
4-82. Phoenix water is provided to approximately 1.5 million
people who are served through more than 370,000 accounts (http://
phoenix.gov/WATER/wtrfacts.html). All accounts are metered and
billed monthly. The probability that an account has an error in a
month is 0.001, and accounts can be assumed to be independent.
(a) What are the mean and standard deviation of the number of
neru
account errors each month?
(b) Approximate the probability of fewer than 350 errors in a month.
(c) Approximate a value so that the probability that the number
of errors exceeds this value is 0.05.
(d) Approximate the probability of more than 400 errors per
month in the next two months. Assume that results between
months are independent.
4-83. An electronic office product contains 5000 electronic com-
ponents. Assume that the probability that each component oper-
ates without failure during the useful life of the product is 0.999,
and assume that the components fail independently. Approximate
the probability that 8 or more of the original 5000 components
fail during the useful life of the product.
4-84. A cornorate Web rita

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