Normally distributed data assumes that about 68% of the values in the sample are within 1 standard deviation of the mean.

正态分布数据认为，样本中约68%的数值分布在距离平均值为1的标准偏差之内。

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Populations, random samples. Sample statistics, moments of the sample mean and variance.

母体， 随机样本。 样本统计， 样本平均数和变异数的动差。

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Approximately 2.5% of the study sample reported never drinking coffee, and approximately 64% did not drink tea. The mean daily coffee consumption among drinkers was 5.7 cups.

受试者中有大约2.5%报告称从不喝咖啡，还有大约64%不喝茶。每天咖啡摄入量的均值为5.7杯。

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We can define it in a couple of different ways depending on whether we're talking about sample mean or population mean.

我们有几种不同的方式去定义这个概念,取决于我们指的是,样本均值还是总体均值

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In a meritocracy the Lords would increasingly come to represent a random sample of the population over the generations, as regression to the mean moves all to the average.

ECONOMIST: On R&D, hospital care, hemp, the House of Lords, AIPAC, Jean Baudrillard, Europe | The