Calculateur d'ecart-type

Calculer l'ecart-type et la variance

Traitement dans le NavigateurVos donnees ne quittent jamais votre navigateur

Standard Deviation

5.2372

Variance

27.4286

Additional Statistics

Mean (μ):18.0000Count (n):8Sum of Squares:192.0000Coefficient of Variation:29.10%
Show Calculation Steps

1. Mean (μ) = Σx / n = 144 / 8 = 18.0000

2. Deviations from mean (x - μ):

10 - 18.0000 = -8.0000, 12 - 18.0000 = -6.0000, 23 - 18.0000 = 5.0000, 23 - 18.0000 = 5.0000, 16 - 18.0000 = -2.0000, 23 - 18.0000 = 5.0000, 21 - 18.0000 = 3.0000, 16 - 18.0000 = -2.0000

3. Squared deviations (x - μ)²:

64.0000, 36.0000, 25.0000, 25.0000, 4.0000, 25.0000, 9.0000, 4.0000

4. Sum of squared deviations = 192.0000

5. Variance (σ²) = 192.0000 / 7 = 27.4286

6. Standard Deviation (σ) = √27.4286 = 5.2372

Data Distribution (68-95-99.7 Rule)

Within 1σ (68%):12.76 to 23.24
Within 2σ (95%):7.53 to 28.47
Within 3σ (99.7%):2.29 to 33.71

About Calculateur d'ecart-type

Calculer l'ecart-type et la variance

Use this free online outils mathematiques tool to work faster without installing extra software. The interface is built for quick input, clear output, and straightforward results on desktop and mobile devices.

Processing

This tool runs in your browser whenever possible, which keeps your inputs private and reduces unnecessary round-trips to the server.

Outils associes

Calculatrice scientifiqueCalculatrice scientifique avancee avec fonctions
Calculateur de pourcentageCalculer des pourcentages, augmentations et diminutions
Calculateur de fractionsAdditionner, soustraire, multiplier, diviser des fractions
Calculateur de ratioCalculer et simplifier des ratios