↔️ 极差Range Calculator
极差 = max - min。本地处理。可设置「数据」。Range = max - min. Processed locally. Settings: Data.
使用说明与常见问题How-to & FAQ
「极差」是什么？What is the Range Calculator tool?
极差 = max - min。本地处理。可设置「数据」。Range = max - min. Processed locally. Settings: Data.
如何使用「极差」？How do I use the Range Calculator tool?
在「极差」中，填写「数据」等参数，结果会随输入实时计算并显示在下方。In the Range Calculator: Fill in "Data"; results are recalculated instantly as you type.
要区分样本和总体吗？Does sample versus population matter?
不需要。极差 = 最大值 − 最小值，样本和总体的计算方式完全相同。只有方差、标准差等统计量才需要区分除以 n 还是 n − 1。No. Range = maximum − minimum is calculated the same way for a sample or a population. Only statistics such as variance and standard deviation differ (dividing by n or n − 1).
能举个计算实例吗？Can you show a worked example?
例如在「极差」中填 数据 = 3 9 2 7，结果区显示：最小：2；最大：9；极差：7For example, entering Data = 3 9 2 7 in the Range Calculator gives: Min: 2; Max: 9; Range: 7
有哪些选项可以调整？What options can I adjust?
「极差」的设置：「数据」默认 3 9 2 7。每次生成结果都按当前设置处理。Settings in the Range Calculator — "Data" default 3 9 2 7. The result always uses the current settings.
计算精度如何？How precise are the results?
「极差」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 Range Calculator uses double-precision floating point (about 15–16 significant digits); very large or very small values may lose precision.
「极差」免费吗？需要注册吗？Is the Range Calculator free? Do I need an account?
「极差」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 Range 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.