【摘要】 本文论述正态母体抽样中,样本方差及样本标准差的有关性质,并改进统计计算中的一个近似计算公式,通过具体计算,论证修正后的公式优于原来的公式。更多还原

【Abstract】 In this article,we discuss the characters of sample variance and sample standard deviation in sampling distribution of normal general population.Furthermore,we improve a formula of approximate computation in statistical calculation.By calculation,we prove that the modified formula is better than the ore.更多还原