Three professors at George Washington University did an experiment to determine if economists are more selfis than other people. They dropped 64 stamped, addressed envelopes with $10 cash in different classrooms on the George Washington campus. 44% were returned overall. From the economics classes 56% of the envelopes wer returned. From the business, psychology, and history classes 31% were returned. R= money returned E = economics classes 0 = other classes 1. Write a probability statement for the overall percent of money returned.

Three professors at George Washington University did an experiment to determine if economists are more selfis than other people. They dropped 64 stamped, addressed envelopes with $10 cash in different classrooms on the George Washington campus. 44% were returned overall. From the economics classes 56% of the envelopes wer returned. From the business, psychology, and history classes 31% were returned. R= money returned E = economics classes 0 = other classes 1. Write a probability statement for the overall percent of money returned.

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Concept explainers

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.

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Three professors at George Washington University did an experiment to determine if economists are more selfish
than other people. They dropped 64 stamped, addressed envelopes with $10 cash in different classrooms on the
George Washington campus. 44% were returned overall. From the economics classes 56% of the envelopes were
returned. From the business, psychology, and history classes 31% were returned.
R= money returned
E = economics classes
O = other classes
1.
Write a probability statement for the overall percent of money returned.

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