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and standard deviation 1.8 ppm. 38 randomly selected large cities mal places where possible. at is the distribution of X? X - N(9.6 1.8 hat is the distribution of ? - N( hat is the probability that one randomly selected city's waterway w llutants?

and standard deviation 1.8 ppm. 38 randomly selected large cities mal places where possible. at is the distribution of X? X - N(9.6 1.8 hat is the distribution of ? - N( hat is the probability that one randomly selected city's waterway w llutants?

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.4: Distributions Of Data
Problem 19PFA
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Question 7 < > The amount of pollutants that are found in waterways near large cities is normally distributed with mean 9.6 ppm and standard deviation 1.8 ppm. 38 randomly selected large cities are studied. Round all answers to 4 decimal places where possible. a. What is the distribution of X? X - N 9.6 b. What is the distribution of ? - N( c. What is the probability that one randomly selected city's waterway will have less than 9.4 ppm pollutants? d. For the 38 cities, find the probability that the average amount of pollutants is less than 9.4 ppm. Submit Question 1.8 e. For part d), is the assumption that the distribution is normal necessary? O Yes No f. Find the IQR for the average of 38 cities. Q1 = ppm Q3 = ppm IQR: ppm
Transcribed Image Text:Question 7 < > The amount of pollutants that are found in waterways near large cities is normally distributed with mean 9.6 ppm and standard deviation 1.8 ppm. 38 randomly selected large cities are studied. Round all answers to 4 decimal places where possible. a. What is the distribution of X? X - N 9.6 b. What is the distribution of ? - N( c. What is the probability that one randomly selected city's waterway will have less than 9.4 ppm pollutants? d. For the 38 cities, find the probability that the average amount of pollutants is less than 9.4 ppm. Submit Question 1.8 e. For part d), is the assumption that the distribution is normal necessary? O Yes No f. Find the IQR for the average of 38 cities. Q1 = ppm Q3 = ppm IQR: ppm
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