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Standard deviation - Simple English Wikipedia, the free encyclopedia

Standard deviation

From the Simple English Wikipedia, the free encyclopedia that anyone can change

Standard deviation is a concept from statistics. It tells how the values are grouped around the mean. It is the average of a set of numbers' difference from the mean.

[change] Method

In a set of data, you find the standard deviation by following these steps:

  1. Find the mean of all the data points.
  2. Subtract the mean from each data point.
  3. Square the deviation for each data point.
  4. Average all these squared deviations.
  5. Find the square root.

Standard deviation can be used to evaluate the precision or consistency of a set of data.


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