relative error of the frequency

例句：

1. 1. The measurement ofa variable is affected by its relative error.
   变量的测量受到其相对误差的影响。
2. 2.The relative error of the measurement is lessthan 0.5%.
   测量的相对误差小于0.5%。
3. 3. The relativeerror of the measurement is calculated using theformula: E = |x̄ -x̄_0| / √(n - 1) ×σ, where x̄ and x̄_0 are the mean values of thesample and the population, respectively, nis the sample size, and σis the standard deviation of the population.
   测量的相对误差通过公式计算得出：E = |x̄ -x̄_0| / √(n - 1) ×σ，其中x̄和x̄_0分别是样本均值和总体均值，n是样本大小，σ是总体的标准差。