Seventy-seven percent of U.S. college students pay their bills on time. You randomly select 4 U.S. college students and ask them whether they pay their bills on time. The random variable represents the number of U.S. college students who pay their bills on time.(a) Construct a probability distribution. (b) Graph the probability distribution using a histogram and describe its shape.(c) Find the mean, variance and standard deviation of the probability distribution and interpret the results. (Use the formulas for binomial probability distribution)

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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.