標本標準偏差計算機

共有リンク

はじめに

Sample Standard Deviation Calculator — Compute the sample standard deviation of a dataset. Enter Dataset (comma-separated) to get an instant, accurate result.

計算式

Sample standard deviation: s = √(Σ(x−mean)² / (n−1)), the square root of the sample variance.

ステップごとの説明

Enter the Dataset (comma-separated).
Click Calculate to see your result instantly.

実例

Example: With Dataset (comma-separated) = 2, 4, 4, 4, 5, 5, 7, 9, the Sample Standard Deviation Calculator gives Sample Std Dev: 2.1381, Mean: 5.

よくある質問

Why divide by n−1?

It's Bessel's correction, which offsets the tendency of a sample to understate the true population variance.

What if I only have one data point?

Sample standard deviation is undefined for n=1, since n−1 would be zero.

What inputs does the Sample Standard Deviation Calculator need?

You'll need to provide: Dataset (comma-separated). All fields use sensible defaults, so you can see a working example immediately and then adjust the values to match your own numbers.

How accurate is the Sample Standard Deviation Calculator?

The Sample Standard Deviation Calculator applies the formula exactly as calculated — Sample standard deviation: s = √(Σ(x−mean)² / (n−1)), the square root of the sample variance. — so results are precise for the inputs you provide. Accuracy depends on entering correct, realistic input values.

Is the Sample Standard Deviation Calculator free to use?

Yes, the Sample Standard Deviation Calculator is completely free, requires no signup, and runs instantly in your browser.