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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 1.3 ppm. 39 randomly selected large cities are studied. Round all answers to 4 decimal places where possible. a. What is the distribution of X? X-N 8.6 1.3 Enter an integer or decimal number, accurate to at least 4 decimal places [more..] b. What is the distribution of ? - N( c. What is the probability that one randomly selected city's waterway will have less than 7.9 ppm pollutants? d. For the 39 cities, find the probability that the average amount of pollutants is less than 7.9 ppm. e. For part d), is the assumption that the distribution is normal necessary? Yes No

The amount of pollutants that are found in waterways near large cities is normally distributed with mean 8.6 ppm and standard deviation 1.3 ppm. 39 randomly selected large cities are studied. Round all answers to 4 decimal places where possible. a. What is the distribution of X? X-N 8.6 1.3 Enter an integer or decimal number, accurate to at least 4 decimal places [more..] b. What is the distribution of ? - N( c. What is the probability that one randomly selected city's waterway will have less than 7.9 ppm pollutants? d. For the 39 cities, find the probability that the average amount of pollutants is less than 7.9 ppm. e. For part d), is the assumption that the distribution is normal necessary? Yes No

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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esc F1 The amount of pollutants that are found in waterways near large cities is normally distributed with mean 8.6 ppm and standard deviation 1.3 ppm. 39 randomly selected large cities are studied. Round all answers to 4 decimal places where possible. a. What is the distribution of X? X-N 8.6 1.3 b. What is the distribution of ? - N Enter an integer or decimal number, accurate to at least 4 decimal places (more..] c. What is the probability that one randomly selected city's waterway will have less than 7.9 ppm pollutants? d. For the 39 cities, find the probability that the average amount of pollutants is less than 7.9 ppm. e. For part d), is the assumption that the distribution is normal necessary? Yes No Question Help:Written Example > Next Question MacBook Air F6 F2 G # 20 F3 $ F4 % F5 G & 7 F7 *00 DII F8 ( DD F9 F10
Transcribed Image Text:esc F1 The amount of pollutants that are found in waterways near large cities is normally distributed with mean 8.6 ppm and standard deviation 1.3 ppm. 39 randomly selected large cities are studied. Round all answers to 4 decimal places where possible. a. What is the distribution of X? X-N 8.6 1.3 b. What is the distribution of ? - N Enter an integer or decimal number, accurate to at least 4 decimal places (more..] c. What is the probability that one randomly selected city's waterway will have less than 7.9 ppm pollutants? d. For the 39 cities, find the probability that the average amount of pollutants is less than 7.9 ppm. e. For part d), is the assumption that the distribution is normal necessary? Yes No Question Help:Written Example > Next Question MacBook Air F6 F2 G # 20 F3 $ F4 % F5 G & 7 F7 *00 DII F8 ( DD F9 F10
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