Answered step by step
Verified Expert Solution
Link Copied!

Question

1 Approved Answer

Rpepeat 20 O Question 20 O Question 20 The amount of pollutants that are found in waterways near large cities is normally distributed with mean

Rpepeat 20

image text in transcribed
O Question 20

O Question 20 The amount of pollutants that are found in waterways near large cities is normally distributed with mean 9.3 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( 9.3 b. What is the distribution of i? - N( 9.3 , 2.0817 0.2082 c. What is the probability that one randomly selected city's waterway will have less than 8.8 ppm pollutants? 0.3520 d. For the 39 cities, find the probability that the average amount of pollutants is less than 8.8 ppm. 0.0082 e. For part d), is the assumption that the distribution is normal necessary? O No@ Yes f. Find the IQR for the average of 39 cities. QI = IQR: ppm ppm ppm

Step by Step Solution

There are 3 Steps involved in it

Step: 1

blur-text-image

Get Instant Access to Expert-Tailored Solutions

See step-by-step solutions with expert insights and AI powered tools for academic success

Step: 2

blur-text-image

Step: 3

blur-text-image

Ace Your Homework with AI

Get the answers you need in no time with our AI-driven, step-by-step assistance

Get Started

Recommended Textbook for

Discrete Mathematics

Authors: Gary Chartrand, Ping Zhang

1st Edition

1478616261, 9781478616269

More Books

Students also viewed these Mathematics questions

Question

d. Is it part of a concentration, minor, or major program?

Answered: 1 week ago