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Discrete Random Variables: Practice 5: Hypergeometric Distribution

Module by: Barbara Illowsky, Ph.D., Susan Dean. E-mail the authors

Summary: Note: This module is currently under revision, and its content is subject to change. This module is being prepared as part of a statistics textbook that will be available for the Fall 2008 semester.

Note: You are viewing an old version of this document. The latest version is available here.

Student Learning Objectives

  • The student will investigate the properties of a hypergeometric distribution.

Given

Suppose that a group of statistics students is divided into two groups: business majors and non-business majors. There are 16 business majors in the group and 7 non-business majors in the group. A random sample of 9 students is taken. We are interested in the number of business majors in the group.

Interpret the Data

Exercise 1

In words, define the Random Variable XX.

Exercise 2

XX ~________________

Exercise 3

XX takes on the values: __________________

Exercise 4

Construct the probability distribution function (PDFPDF) for XX.

Table 1
XX P(X=x)P(X=x)
   
   
   
   
   
   
   
   
   
   

Exercise 5

On average(μμ), how many would you expect to be business majors?

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