某直线段距离丈量了四次,其结果为:124.387m,124.375m,124.391m,124.385m。计算其算术平均值和观测值中误差。
某直线段距离丈量了四次,其结果为:124.387m,124.375m,124.391m,124.385m。计算其算术平均值和观测值中误差。
【正确答案】:
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