Global survey The marketing research organization GfK Custom Research North America conducts a yearly sur-vey on consumer attitudes worldwide. They collect de-mographic information on the roughly 1500 respondents from each country that they survey. Here is a table show-ing the number of people with various levels of education in five countries:If we select someone at random from this survey,a) what is the probability that the person is from theUnited States?b) what is the probability that the person completed hisor her education before college?c) what is the probability that the person is from Franceor did some post-graduate study?d) what is the probability that the person is from Franceand finished only primary school or less?   Educational Level by Country Post-graduate College SomehighschoolPrimaryor lessNoanswer TotalChina 7 315 671 506 3 1502France 69 388 766 309 7 1539India 161 514 622 227 11 1535U.K. 58 207 1240 32 20 1557U.S. 84 486 896 87 4 1557Total 379 1910 4195 1161 45 7690

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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.