A record store owner knows that 25% of customers entering her store make a purchase.Consider a random sample consisting of 100 customers who entered the store.(a) What is the mean and variance of the sample proportion of customers making apurchase?(b) What is the probability that the sample proportion is less than 0.20?(c) She calculated the probability that the sample proportion is lower than a propor-tion a, and the probability turned out 0.05. Then what is this number a?

Let p be the proportion of customers entering the store make a purchase. Given that p = 0.25 Also,…

What is the mean and variance of the sample proportion of customers making a purchase? What is the probability that the sample proportion is less than 0.20? She calculated the probability that the sample proportion is lower than a propor- tion a, and the probability turned out 0.05. Then what is this number a?

What is the mean and variance of the sample proportion of customers making a purchase? What is the probability that the sample proportion is less than 0.20? She calculated the probability that the sample proportion is lower than a propor- tion a, and the probability turned out 0.05. Then what is this number a?

College Algebra

10th Edition

ISBN:9781337282291

Author:Ron Larson

Publisher:Ron Larson

Chapter8: Sequences, Series,and Probability

Section8.7: Probability

Problem 11ECP: A manufacturer has determined that a machine averages one faulty unit for every 500 it produces....

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