The amount of pollutants that are found in waterways near large cities is normally distributed with mean 9.3 ppm andstandard deviation 1.3 ppm. 40 randomly selected large cities are studied. Round all answers to 4 decimal places wherepossible.a. What is the distribution of X? X ~ N(b. What is the distribution of ? ¤ ~ N(c. What is the probability that one randomly selected city's waterway will have less than 8.6 ppm pollutants?d. For the 40 cities, find the probability that the average amount of pollutants is less than 8.6 ppm.e. For part d), is the assumption that the distribution is normal necessary? O No O Yesf. Find the IQR for the average of 40 cities.Q1 =ppmQ3 =ppmIQR:ppm

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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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