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The amount of pollutants that are found in waterways near large cities is normally distributed with mean 9.2 ppm and standard deviation 1.4 ppm. 13 randomly selected large cities are studied. Round all answers to 4 decimal places where possible. erway will have more cre d. For the 13 cities, find the probability that the average amount of pollutants is more than 9.9 ppm. e. For part d), is the assumption that the distribution is normal necessary? O Yes No f. Find the IQR for the average of 13 cities. Q1 = ppm Q3 = IQR: ppm ppm

The amount of pollutants that are found in waterways near large cities is normally distributed with mean 9.2 ppm and standard deviation 1.4 ppm. 13 randomly selected large cities are studied. Round all answers to 4 decimal places where possible. erway will have more cre d. For the 13 cities, find the probability that the average amount of pollutants is more than 9.9 ppm. e. For part d), is the assumption that the distribution is normal necessary? O Yes No f. Find the IQR for the average of 13 cities. Q1 = ppm Q3 = IQR: ppm ppm

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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The amount of pollutants that are found in waterways near large cities is normally distributed with mean 9.2 ppm and standard deviation 1.4 ppm. 13 randomly selected large cities are studied. Round all answers to 4 decimal places where possible. d. For the 13 cities, find the probability that the average amount of pollutants is more than 9.9 ppm. erway will have more tre e. For part d), is the assumption that the distribution is normal necessary? O Yes No f. Find the IQR for the average of 13 cities. Q1 = ppm Q3 = IQR: ppm ppm
Transcribed Image Text:The amount of pollutants that are found in waterways near large cities is normally distributed with mean 9.2 ppm and standard deviation 1.4 ppm. 13 randomly selected large cities are studied. Round all answers to 4 decimal places where possible. d. For the 13 cities, find the probability that the average amount of pollutants is more than 9.9 ppm. erway will have more tre e. For part d), is the assumption that the distribution is normal necessary? O Yes No f. Find the IQR for the average of 13 cities. Q1 = ppm Q3 = IQR: ppm ppm
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