📈 相对标准偏差 RSD（变异系数）Relative Standard Deviation Calculator

使用说明与常见问题How-to & FAQ

「相对标准偏差 RSD（变异系数）」是什么？What is the Relative Standard Deviation Calculator tool?

RSD = 标准差 ÷ |平均值| × 100%，也叫变异系数（CV）。可选样本标准差（n - 1）或总体标准差（n）。本地处理。RSD = standard deviation ÷ |mean| × 100%, also called the coefficient of variation (CV). Choose sample (n - 1) or population (n) standard deviation. Processed locally.

如何使用「相对标准偏差 RSD（变异系数）」？How do I use the Relative Standard Deviation Calculator tool?

在「相对标准偏差 RSD（变异系数）」中，填写「标准差类型」等参数，结果会随输入实时计算并显示在下方。In the Relative Standard Deviation Calculator: Fill in "Standard deviation"; results are recalculated instantly as you type.

多少算好？What is good?

分析化学里 RSD < 2% 常被视为精密度良好，但标准因领域而异。In analytical chemistry RSD < 2% is often considered precise, but norms vary by field.

能举个计算实例吗？Can you show a worked example?

例如在「相对标准偏差 RSD（变异系数）」中填 标准差类型 = 样本 (n − 1)，结果区显示：RSD：42.7618%；平均值：5；标准差：2.13809；个数：8For example, entering Standard deviation = Sample (n − 1) in the Relative Standard Deviation Calculator gives: RSD: 42.7618%; Mean: 5; Standard deviation: 2.13809; Count: 8

有哪些选项可以调整？What options can I adjust?

「相对标准偏差 RSD（变异系数）」的设置：「标准差类型」可选 样本 (n - 1)、总体 (n)（默认 样本 (n - 1)）。每次生成结果都按当前设置处理。Settings in the Relative Standard Deviation Calculator — "Standard deviation": Sample (n - 1), Population (n) (default Sample (n - 1)). The result always uses the current settings.

计算精度如何？How precise are the results?

「相对标准偏差 RSD（变异系数）」使用 JavaScript 双精度浮点数（约 15–16 位有效数字）；极大或极小的数值可能存在精度误差。The Relative Standard Deviation Calculator uses double-precision floating point (about 15–16 significant digits); very large or very small values may lose precision.

「相对标准偏差 RSD（变异系数）」免费吗？需要注册吗？Is the Relative Standard Deviation Calculator free? Do I need an account?

「相对标准偏差 RSD（变异系数）」完全免费，无需注册或安装，打开网页即可使用，手机和电脑都能用；输入的内容只在你的浏览器本地处理。The Relative Standard Deviation Calculator is completely free with no sign-up or install and works on phones and desktops; what you enter is processed only in your browser.