In a survey of 250 employees of a company regarding their 401(K) investments, the following data were obtained. 143 had investments in stock funds. 93 had investments in bond funds. 74 had investments in money market funds. 48 had investments in stock funds and bond funds. 35 had investments in stock funds and money market funds. 38 had investments in bond funds and money market funds. 50 had investments exclusively in some other vehicle.   (a) How many of the employees surveyed had investments in all three types of funds?  employees (b) How many of the employees had investments in stock funds only?  employees

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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.