What Is Standard Deviation? Simple Explanation with Example

Learn what standard deviation means and see an easy example to understand how data spread is measured in statistics.

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Standard deviation measures how spread out numbers are in a data set. For example, in the set {2, 4, 4, 4, 5, 5, 7, 9}, the standard deviation is about 2. A low standard deviation means data points are close to the mean, while a high standard deviation indicates more spread.

FAQs & Answers

  1. What is standard deviation in statistics? Standard deviation is a measure of how spread out the numbers in a data set are around the mean.
  2. How do you calculate standard deviation? You calculate standard deviation by finding the square root of the average squared differences from the mean of the data set.
  3. What does a low standard deviation indicate? A low standard deviation means data points are close to the mean, showing less variability in the data.

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