📈 统计计算器（平均数/中位数/标准差）Statistics Calculator (Mean, Median, SD)
输入一组数据，计算平均数、中位数、众数、方差、标准差、四分位数等。Compute mean, median, mode, variance, standard deviation, quartiles and more.
使用说明与常见问题How-to & FAQ
「统计计算器（平均数/中位数/标准差）」是什么？What is the Statistics Calculator (Mean, Median, SD)?
输入一组数据，计算平均数、中位数、众数、方差、标准差、四分位数等。Compute mean, median, mode, variance, standard deviation, quartiles and more.
如何使用「统计计算器（平均数/中位数/标准差）」？How do I use the Statistics Calculator (Mean, Median, SD)?
在「统计计算器（平均数/中位数/标准差）」中，填写上方字段等参数，结果会随输入实时计算并显示在下方。In the Statistics Calculator (Mean, Median, SD): Fill in the fields above; results are recalculated instantly as you type.
计算精度如何？How precise are the results?
「统计计算器（平均数/中位数/标准差）」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 Statistics Calculator (Mean, Median, SD) uses double-precision floating point (about 15–16 significant digits); very large or very small values may lose precision.
「统计计算器（平均数/中位数/标准差）」免费吗？需要注册吗？Is the Statistics Calculator (Mean, Median, SD) free? Do I need an account?
「统计计算器（平均数/中位数/标准差）」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 Statistics Calculator (Mean, Median, SD) is completely free with no sign-up or install and works on phones and desktops; what you enter is processed only in your browser.