一、绝对误差和相对误差在实际测量过程中,测量所得到的数值与被测量真实值之间不可避免地存在差异,这种差异称为测量误差.我们把测量值 x 和真实值μ的差值△x 称为测量值的绝对误差△x=x-μ由于测量值的绝对误差不能很好反映一个测量值的精确程度,例如:测量长度10m 绝对误差0.02m 和测量长度1m 绝对误差0.02m 相比较,显然第一个测量精确程度高一些,因此,在实际测量中,我们把测量 1. Absolute error and relative error In the actual measurement process, there is an inevitable difference between the measured value and the measured true value. This difference is called the measurement error. We set the difference between the measured value x and the real value μ. The value △x is called the absolute value of the measured value Δx = x - μ Because the absolute value of the measured value does not reflect the accuracy of a measured value well, for example: measuring length 10m absolute error 0.02m and measuring length 1m absolute error 0.02m In comparison, it is clear that the first measurement has a higher degree of accuracy. Therefore, in the actual measurement, we measure