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The amount of pollutants that are found in waterways near large cities is normally distributed with mean 8.6 ppm and standard deviation 1.7 ppm. 35 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 ? ~ NO c. What is the probability that one randomly selected city's waterway will have more than 9.1 ppm pollutants?

The amount of pollutants that are found in waterways near large cities is normally distributed with mean 8.6 ppm and standard deviation 1.7 ppm. 35 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 ? ~ NO c. What is the probability that one randomly selected city's waterway will have more than 9.1 ppm pollutants?

MATLAB: An Introduction with Applications
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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The amount of pollutants that are found in waterways near large cities is normally distributed with mean 8.6 ppm and standard deviation 1.7 ppm. 35 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 a? ~ N( c. What is the probability that one randomly selected city's waterway will have more than 9.1 ppm pollutants? d. For the 35 cities, find the probability that the average amount of pollutants is more than 9.1 ppm. e. For part d), is the assumption that the distribution is normal necessary? ONo O Yes f. Find the IQR for the average of 35 cities. Q1 = ppm Q3 = ppm IQR: ppm
Transcribed Image Text:The amount of pollutants that are found in waterways near large cities is normally distributed with mean 8.6 ppm and standard deviation 1.7 ppm. 35 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 a? ~ N( c. What is the probability that one randomly selected city's waterway will have more than 9.1 ppm pollutants? d. For the 35 cities, find the probability that the average amount of pollutants is more than 9.1 ppm. e. For part d), is the assumption that the distribution is normal necessary? ONo O Yes f. Find the IQR for the average of 35 cities. Q1 = ppm Q3 = ppm IQR: ppm
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as per bartleby guideline expert have to answer first three subparts only dear student please upload other separately

 

give data

 

normal distribution

μ=8.6σ=1.7n=35

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