4.20 Chickenpox, Part II. We learned in Exercise 4.18 that about 90% of American adults had chickenpox before adulthood. We now consider a random sample of 120 American adults. (a) How many people in this sample would you expect to have had chickenpox in their childhood? And with what standard deviation? (b) Would you be surprised if there were 105 people who have had chickenpox in their childhood? (c) What is the probability that 105 or fewer people in this sample have had chickenpox in their childhood? How does this probability relate to your answer to part (b)?

4.20 Chickenpox, Part II. We learned in Exercise 4.18 that about 90% of American adults had chickenpox before adulthood. We now consider a random sample of 120 American adults. (a) How many people in this sample would you expect to have had chickenpox in their childhood? And with what standard deviation? (b) Would you be surprised if there were 105 people who have had chickenpox in their childhood? (c) What is the probability that 105 or fewer people in this sample have had chickenpox in their childhood? How does this probability relate to your answer to part (b)?

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Description: 4.20 Chickenpox, Part II. We learned in Exercise 4.18 that about 90% of Americanadults had chickenpox before adulthood. We now consider a random sample of 120American adults.(a) How many people in this sample would you expect to have had chickenpox

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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Concept explainers

Contingency Table

A contingency table can be defined as the visual representation of the relationship between two or more categorical variables that can be evaluated and registered. It is a categorical version of the scatterplot, which is used to investigate the linear relationship between two variables. A contingency table is indeed a type of frequency distribution table that displays two variables at the same time.

Binomial Distribution

Binomial is an algebraic expression of the sum or the difference of two terms. Before knowing about binomial distribution, we must know about the binomial theorem.

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Question

4.20 Chickenpox, Part II. We learned in Exercise 4.18 that about 90% of American
adults had chickenpox before adulthood. We now consider a random sample of 120
American adults.
(a) How many people in this sample would you expect to have had chickenpox in their
childhood? And with what standard deviation?
(b) Would you be surprised if there were 105 people who have had chickenpox in their
childhood?
(c) What is the probability that 105 or fewer people in this sample have had chickenpox
in their childhood? How does this probability relate to your answer to part (b)?

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