18. The distribution ages for students at the state collegeis positively skewed with a mean of u = 21.5 and astandard deviation of o =3.a. What is the probability of selecting a random sam-ple of n = 4 snadents with an average age greaterthan 23? (Careful: This is a trick question.)RIAASTsample of n = 36 students with an average ageb. What is the probability of selecting a randomgreater than 23?c. For a sample of n = 36 students, what is the prob-ability that the average age is between 21 and 22?

GivenMean(μ)=21.5standard deviation(σ)=3

Answered: 18. The distribution ages for students…

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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The amount of pollutants that are found in waterways near large cities is normally distributed with mean 9.3 ppm and standard deviation 1.6 ppm. 6 randomly selected large cities are studied. Round all answers to 4 decimal places where possible. 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 more than 8.8 ppm pollutants? d. For the 6 cities, find the probability that the average amount of pollutants is more than 8.8 ppm. e. For part d), is the assumption that the distribution is normal necessary? O No Yes Question Help: Written Example Message instructor Submit Question Jump to Answer
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