名词
中文翻译：样本方差矩阵
同义词：
['sample covariance matrix', 'sample covariance matrix']
例句：
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1. In this study, we used a sample variance matrix to analyze the data.
在这项研究中，我们使用样本方差矩阵来分析数据。
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2.The sample variance matrix was used to estimate the population variance.
样本方差矩阵被用来估计总体方差。
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3.The sample variance matrix is a statistical tool that helps researchers understand the variability of a sample from the population.
样本方差矩阵是统计工具，帮助研究人员理解样本从总体的变异性。