2. In a recent poll, 13% of all respondents said that they were afraid of heights. Suppose this percentage is true for all Americans. Assume responses from different individuals are independent. (a) What is the probability of having 3 randomly selected Americans all say that they are afraid of heights? (Enter a decimal as your answer, round to the nearest thousandth when necessary) (b) What is the probability of having none of the 3 randomly selected Americans say that they are afraid of heights? (Enter a decimal as your answer, round to the nearest thousandth when necessary) (c) What is the probability of having at least 1 of the 3 randomly selected Americans say that they are afraid of heights?
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.
2. In a recent poll, 13% of all respondents said that they were afraid of heights. Suppose this
percentage is true for all Americans. Assume responses from different individuals are independent.
(a) What is the probability of having 3 randomly selected Americans all say that they are afraid of
heights? (Enter a decimal as your answer, round to the nearest thousandth when necessary)
(b) What is the probability of having none of the 3 randomly selected Americans say that they are
afraid of heights? (Enter a decimal as your answer, round to the nearest thousandth when
necessary)
(c) What is the probability of having at least 1 of the 3 randomly selected Americans say that they
are afraid of heights? (Enter a decimal as your answer, round to the nearest thousandth when
necessary)
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