📉 标准误计算器Standard Error Calculator
由样本数据或标准差与样本量计算均值标准误 SE = s/√n，并给出 95% 置信区间。Standard error of the mean SE = s/√n from raw data or from SD and sample size, with a 95% confidence interval.
使用说明与常见问题How-to & FAQ
「标准误计算器」是什么？What is the Standard Error Calculator tool?
由样本数据或标准差与样本量计算均值标准误 SE = s/√n，并给出 95% 置信区间。Standard error of the mean SE = s/√n from raw data or from SD and sample size, with a 95% confidence interval.
如何使用「标准误计算器」？How do I use the Standard Error Calculator tool?
在「标准误计算器」中，填写「输入方式」、「标准差 s」、「样本量 n」、「均值(可选)」等参数，结果会随输入实时计算并显示在下方。In the Standard Error Calculator: Fill in "Input", "Standard deviation s", "Sample size n", "Mean (optional)"; results are recalculated instantly as you type.
计算精度如何？How precise are the results?
「标准误计算器」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 Standard Error Calculator uses double-precision floating point (about 15–16 significant digits); very large or very small values may lose precision.
「标准误计算器」免费吗？需要注册吗？Is the Standard Error Calculator free? Do I need an account?
「标准误计算器」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 Standard Error 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.