Example 3: Suppose your final exam in a statistics course is composed of 2 portions, one of which consists entirely of multiple choice questions. There are 8 questions in total and each question has 4 possible answers with only 1 correct answer out of the 4. Suppose that you were to randomly guess on all 8 questions. Consider this scenario as you answer the following questions. a) How many questions would you expect to get correct? b) What is the probability that you get exactly 2 questions correct? c) What is the probability that you get at least 3 questions correct?

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Q: Use combinations to answer the following problem: I want to choose a group of students from my…

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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.