MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN: 9781119256830
Author: Amos Gilat
Publisher: John Wiley & Sons Inc
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Concept explainers

Percentage
A percentage is a number indicated as a fraction of 100. It is a dimensionless number often expressed using the symbol %.
Algebraic Expressions
In mathematics, an algebraic expression consists of constant(s), variable(s), and mathematical operators. It is made up of terms.
Numbers
Numbers are some measures used for counting. They can be compared one with another to know its position in the number line and determine which one is greater or lesser than the other.
Subtraction
Before we begin to understand the subtraction of algebraic expressions, we need to list out a few things that form the basis of algebra.
Addition
Before we begin to understand the addition of algebraic expressions, we need to list out a few things that form the basis of algebra.
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The amount of pollutants that are found in waterways near large cities is normally distributed with mean 9.4 ppm and standard deviation 1.4 ppm. 6 randomly selected large cities are studied. Round all answers to 4 decimal places where possible. a. What is the distribution of X? X - N( b. What is the distribution of x? a - N( c. What is the probability that one randomly selected city's waterway will have more than 8.7 ppm pollutants? d. For the 6 cities, find the probability that the average amount of pollutants is more than 8.7 ppm. e. For part d), is the assumption that the distribution is normal necessary? O YesO No f. Find the IQR for the average of 6 cities. Q1 = ppm Q3 = ppm IQR: ppm
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Transcribed Image Text:The amount of pollutants that are found in waterways near large cities is normally distributed with mean 9.4 ppm and standard deviation 1.4 ppm. 6 randomly selected large cities are studied. Round all answers to 4 decimal places where possible. a. What is the distribution of X? X - N( b. What is the distribution of x? a - N( c. What is the probability that one randomly selected city's waterway will have more than 8.7 ppm pollutants? d. For the 6 cities, find the probability that the average amount of pollutants is more than 8.7 ppm. e. For part d), is the assumption that the distribution is normal necessary? O YesO No f. Find the IQR for the average of 6 cities. Q1 = ppm Q3 = ppm IQR: ppm
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