The standard deviation formula may look confusing, but it will make sense after we break it down. In the coming sections, we'll walk through a step-by-step interactive example.

The formula we use for standard deviation depends on whether the data is being considered a population of its own, or the data is a sample representing a larger population.

The standard deviation formula may look confusing, but it will make sense after we break it down. In the coming sections, we'll walk through a step-by-step interactive example.

Learn step-by-step how to calculate standard deviation on Khan Academy.

Finally, we'll take the square root of the variance to get the standard deviation. The complete step-by-step method is also explained. Created by Ashish Gupta.

The range is easy to calculate—it's the difference between the largest and smallest data points in a set. Standard deviation is the square root of the variance. Standard deviation is a measure of how spread …

We learn how to calculate the mean and standard deviation of a discrete random variable. The concept of a random variable is explained, along with methods to calculate its expected value (mean) and …

Standard deviation involves adding and subtracting values at various steps in the calculation process. For example, the differences between each data point and the mean are calculated, squared, …

Statistics and probability Course: Statistics and probability > Unit 9 Lesson 1: Discrete random variables Standard deviation of a discrete random variable

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