Standaardafwijking Calculator

Bereken standaardafwijking en variantie

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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 Standaardafwijking Calculator

Bereken standaardafwijking en variantie

Use this free online wiskunde tools 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.

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