Suppose That in One Town 10% of People Are Left

question 92

Essay

Suppose that in one town 10% of people are left handed. Suppose that you want to find the probability of getting exactly 2 left-handed people when 4 people are randomly selected.
Can the answer be found as follows: Use the multiplication rule to find the probability of getting two left handers followed by two right handers, which is (0.1)(0.1)(0.9)(0.9)? If not,
explain why not and show how the required probability can be found.

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Definitions:

Median

The middle value in a data set when the values are arranged in ascending or descending order.

Negative Correlation

A relationship between two variables where one variable increases as the other decreases.

Variable Increases

A situation in which the value of a variable becomes larger.

Relative Frequencies

The ratio of the number of times a particular value occurs to the total number of observations, used in statistical analysis.