名词
中文翻译：估计的方差
同义词：
['estimated variance', 'estimated standard deviation']
例句：
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1. The estimate of the variance is accurate to within a few percent.
这个方差的估计准确度在几个百分点之内。
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2. The standard deviation is estimated based on the sample data.
标准差是根据样本数据估计出来的。
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3. The variance of the population is estimated using the sample variance.
总体方差使用样本方差来估计。