2. Let z be the normal random variable. A value is to be selected at random from zdistribution. Find the value of c such that,a. P(z < c) = 0.9772b. P(z < c) = 0.0688c. P(z > c) = 0.9599Suppose that in a examination, the cutoff score for passing is 75 for 250 people. If the mean ofthe test is 84 with a standard deviation of 5 and the scores are normally distributed, (a) whatproportion of people passed the test? (b) how many have scores between 80 and 93?

Answered: Image /qna-images/answer/6c886085-6855-40ab-990e-8b9b3b39673f.jpg

Answered: 2. Let z be the normal random variable.…

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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Suppose the random variable X follows a normal distribution with mean 70 and variance 100. Then the probability is 0.6826 that X is in the symmetric interval about the mean between two numbers are O A. None O B. 70 and 90 O C. -1 and 1 OD. 60 and 80
Please read the following question carefully and type the solution down accordingly. 1. X₁, X₂, X3, X₁ is the sample from x that has the normal distribution N(0,4) and a(X₁-2X₂2)² +b(3X₂-4X₂)² has a x² (n), Find the values of a, b and n. distrbituion
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