USA today reported that about 20% of all people in the United States are illiterate. Suppose you take eight people a random off of the city street. How many people would you need to interview to be 95% sure that at least seven of these people can read and write
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.
USA today reported that about 20% of all people in the United States are illiterate. Suppose you take eight people a random off of the city street. How many people would you need to interview to be 95% sure that at least seven of these people can read and write (
Let success be defined as literate people.
Probability i=of literate people (or success) is p=0.8
Computer n such that P(r≥7)=0.95
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