Scores on a certain standardized test, IQ scores, are approximately normally distributed with mean μ = 100 and standard deviation o= 15. Here we are referring to the distribution of scores over a very large population, and we approximate that discrete cumulative distribution function by a normal continuous cumulative distribution function. (a) An individual is selected at random. What is the probability that his score X satisfies 120 < X < 130? (b) Two individuals are selected at random, independently. What is the probability that their scores X and Y satisfy max (X,Y) > 120?
Scores on a certain standardized test, IQ scores, are approximately normally distributed with mean μ = 100 and standard deviation o= 15. Here we are referring to the distribution of scores over a very large population, and we approximate that discrete cumulative distribution function by a normal continuous cumulative distribution function. (a) An individual is selected at random. What is the probability that his score X satisfies 120 < X < 130? (b) Two individuals are selected at random, independently. What is the probability that their scores X and Y satisfy max (X,Y) > 120?
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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