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Standard Deviation Calculator

Calculate the population standard deviation (总体标准差), mean, and variance.

01 / INPUTS

Separate numbers with commas.

02 / RESULT

POPULATION STD DEV

2

Std dev
2
Mean
5
Variance
4
Count
8

Calculation trace

  1. (2 + 4 + 4 + 4 + 5 + 5 + 7 + 9) ÷ 8 = 5
    5
    Mean
  2. Σ(x − 5)² ÷ 8 = 4
    4
    Population variance
  3. √4 = 2
    2
    Population standard deviation
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SOURCES