memory test, the test subjects are given a large number and asked to memorize it. Historical records show that 80% of test subjects pass the test. to pass the test, a subject must exactly repeat all the digits in the number after two hours. A random sample of 625 people to take the memory test is going to be chosen. Let p be the proportion of people in the sample who pass the test. a) find the mean of p b) find the standard deviation of p c) compute an approximation of P (p<0.84) which is the probability that fewer than 84% of the people in the sample pass the test. Round your answer to four

MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
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Chapter1: Starting With Matlab
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In a memory test, the test subjects are given a large number and asked to memorize it. Historical records show that 80% of test subjects pass the test. to pass the test, a subject must exactly repeat all the digits in the number after two hours.

A random sample of 625 people to take the memory test is going to be chosen. Let p be the proportion of people in the sample who pass the test.

a) find the mean of p

b) find the standard deviation of p

c) compute an approximation of P (p<0.84) which is the probability that fewer than 84% of the people in the sample pass the test. Round your answer to four decimal places

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