Planos

Calculadora de desvio padrão

Digite seus números e escolha população ou amostra.

Pelo menos dois valores, separados por vírgulas ou espaços

Resultado

Digite os valores e toque em Calcular para ver o resultado.

Fórmula

σ=∑(xi−μ)2n\sigma = \sqrt{\frac{\sum (x_i - \mu)^2}{n}}

Population standard deviation.

s=∑(xi−xˉ)2n−1s = \sqrt{\frac{\sum (x_i - \bar{x})^2}{n - 1}}

Sample standard deviation uses n − 1 (Bessel’s correction).

Como usar esta calculadora

  1. Enter the data and choose population if it is the whole group, or sample if it is part of a larger group.
  2. Press Calculate.

Exemplo resolvido

Population: 2, 4, 4, 4, 5, 5, 7, 9

The mean is 5 and the squared deviations add up to 32.

Variance = 32 / 8 = 4, so the standard deviation is √4 = 2.

Perguntas frequentes

Population or sample?

Use population when you have every member of the group; use sample when your data is a subset used to estimate the whole.

What does standard deviation tell me?

How far values typically are from the mean. Larger means more spread out.

Saiba mais