Lesson: Standard Deviation and Variance of Discrete Random Variables Glencoe • Algebra 1 • Common Core • Glencoe • Algebra 2 • Common Core • Glencoe • Precalculus • Common Core

Mathematics

In this lesson, we will learn how to calculate the variance and standard deviation of a probability distribution.

Sample Question Videos

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Worksheet

Q1:

The function in the given table is a probability function of a discrete random variable . Find the standard deviation of . Give your answer to two decimal places.

Q2:

The function in the given table is a probability function of a discrete random variable . Find the standard deviation of . Give your answer to two decimal places.

	4	6	10

Q3:

The function in the given table is a probability function of a discrete random variable . Given that the expected value of is 6.5, find the standard deviation of . Give your answer to two decimal places.

	3		6	8
	0.2	0.1	0.1	0.6

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