Lesson: Expected Values of Discrete Random Variables Glencoe • Algebra 1 • Common Core • Glencoe • Algebra 2 • Common Core • Glencoe • Precalculus • Common CoreMathematics
In this lesson, we will learn how to calculate the expected value from both a table and a graph and learn how to calculate the variance for a probability distribution.
Sample Question Videos
Work out the expected value of the random variable whose probability distribution is shown.
The function in the given table is a probability function of a discrete random variable . Find the expected value of .
The frequency table shows the number of cars that 65 families have.
|Number of Cars||1||2||3||4|
Find the mean number of cars per family.
This data can be expressed as a probability distribution for the discrete random variable as shown. Find the value of , , , and .
Calculate the expected value of .