A company sells machine tools to two firms in a certain city. In 50% of the years it makes a sale to the first firm, in 90% of the years it makes a sale to the second firm, and in 45% of the years it makes a sale to both. Are the events "a sale to the first firm" and "a sale to the second firm" independent?
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.
A company sells machine tools to two firms in a certain city. In 50% of the years it makes a sale to the first firm, in 90% of the years it makes a sale to the second firm, and in 45% of the years it makes a sale to both. Are the events "a sale to the first firm" and "a sale to the second firm" independent?
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