百分比 error calculator
Percent error between a measured 和 a true value、plus absolute error、百分比 difference.
关于百分比 error calculator
Percent error between a measured 和 a true value、plus absolute error、百分比 difference.
属于 SmartCalcy“数学”板块。它在你的浏览器中运行，无需账号，使用你自己的货币和单位（可在页面顶部更改），所给结果仅为估算、仅供参考，因此在依赖结果之前请查阅官方指引。
如何使用百分比 error calculator
它计算什么，何时使用
Compares a measured 或 estimated value with the true 或 accepted value 和 states the gap as a percentage. It 是 science labs 的 used、工程计数法 checks、forecasting.
使用步骤
- Enter the 数值 you measured.
- Enter the true 或 accepted 数值.
- Read the 百分比 error、absolute error、signed error.
各输入项的含义
- Measured 数值 – The experimental, observed 或 estimated 结果.
- True 数值 – The theoretical 或 accepted 数值. It cannot be zero.
如何阅读结果
- 百分比 error – The 大小 the error as a percentage the true value.
- Signed error – Positive if you measured too 最高, negative if too 最低.
- 百分比 difference – Compares two 数值 with 都不是 one treated as correct.
公式
百分比 error = |measured − true| ÷ |true| × 100. 百分比 difference = |a − b| ÷ ((|a| + |b|) ÷ 2) × 100.
计算示例
A student measures gravitational acceleration as 9.6 m/s² when the accepted value 是 9.81. The absolute error 是 0.21、so the percent error 是 0.21 ÷ 9.81 × 100 = 2.141%,、the signed error 是 −2.141% because the measurement 是 low.
假设与局限
- The true value 是 known 和 non-zero.
- 件数 must match.
常见错误
- Dividing by the measured 数值 instead the true 数值.
- Using 百分比 error when there 是 否 accepted 数值.
常见问题
罐 百分比 error be negative?
The standard definition uses the absolute 数值, so it 是 positive. The signed error shows 方向.
What if the true 数值 是 zero?
百分比 error 是 无定义. Use absolute error instead.
相关工具
详情
- Absolute error
- 0.21
- Signed error
- -2.141%measured 数值 是 below the true 数值
- 百分比 difference
- 2.164%relative 至 the average the two 数值