We learned in Exercise 4.18 that about 90% of American adults had chickenpox before adulthood. We now consider a random sample of 120 Americans. 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?
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.
We learned in Exercise 4.18 that about 90% of American adults had chickenpox before adulthood. We now consider a random sample of 120 Americans.
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?
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