The following data were collected in a survey of 8th graders and summarize their cell phone status. What proportion of the 8th graders have cell phones? What proportion of the boys do not have cell phones? Is ownership of a cell phone independent of sex? Justify your answer. What proportion of smart phone users are boys? No cell phone Smart phone user Conventional cell phone user Boys 55 65 35 Girls 31 78 27

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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.