名词
中文翻译：样本方差
同义词：
['sample variance', 'sample standard deviation']
例句：
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1.In this study, we used a sample of 50 students to estimate the average score for all students in the class.
在这个研究中，我们使用了一个包含50名学生的样本来估计全班学生的平均分数。
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2. The sample variance is calculated by taking the mean squared difference between each observed value and the expected value.
样本方差是通过计算每个观测值与期望值之间的平方差之和来计算的。
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3.The sample variance can be used to test whether the population mean is significantly different from the sample mean.
样本方差可以用来检验总体均值是否与样本均值有显著差异。