Cum se calculează Standard Deviation
Ce este Standard Deviation?
Standard deviation measures how spread out the values in a dataset are from the mean. A low standard deviation means values cluster tightly; a high one means they are spread out. It is the square root of variance.
Ghid pas cu pas
- 1Find the mean x̄
- 2Subtract the mean from each value and square the result: (xᵢ − x̄)²
- 3Average the squared differences (÷n for population, ÷(n−1) for sample)
- 4Take the square root
Exemple rezolvate
Intrare
2, 4, 4, 4, 5, 5, 7, 9
Rezultat
σ = 2.0, mean = 5
Population std dev
Intrare
Heights: 170,172,168,175,165
Rezultat
σ ≈ 3.49 cm
Mean = 170 cm
Ești gata să calculezi? Încercați calculatorul gratuit Standard Deviation
Încercați singur →