If it is a normal distribution, standard deviation (s) is observed.
若是正态分布,则进一步观察标准差。
There is no significant difference between the result of the method and that of micro-Kjeldahl′s method according tot test. The relative standard deviation is 3.1%.
经t检验证明,该方法的测定结果与微量凯氏定氮法无显著差异,测定结果的相对标准偏差为3.1%。
By using the sample mean range( R )instead of standard deviation of the sample( S )in"S " method, the"R " method is obtained in this paper.
在“S”法的基础上,利用样本平均极差R代替“S”法中的样本标准差S ,从而得到了“R”法,并且给出了相应的样本大小,及各种情况下的接收标准。
That's got the lowest possible standard deviation of expected return and that's 25% stocks and 75% bonds with this sample period.
这个组合预期回报的标准差最小,在这一点上,投资组合,由25%的股票和75%的债券构成。
Let's suppose that all of them are the same-- they all have the same standard deviation.
我们假设这些资产的收益率标准差-,均相等。
If there's a large standard deviation it would be spread.
如果标准偏差值很大,那么它就比较分散。
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