图1：平均值为3且方差为1的正态分布。

Figure 1: a normal distribution with mean 3 and variance 1.

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针对医生提供的数据，在样本服从正态分布的假设下，进行了频数分析、配对检验和方差分析。

According to data provided by doctor, under the assumption that sample is normal, performed frequency analysis, pair test and variance analysis.

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计量资料差异性比较采用单因素方差分析，非正态分布资料经正态转换后再作统计学处理。

Difference of measurement data was compared with single factor analysis of variance. After normal transformation, the non-normal distribution data were conducted with statistical disposal.

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Central tendency is a measure of the center of a probability distribution of the-- Central tendency is a measure-- Variance is a measure of how much things change from one observation to another.

集中趋势用以描述,一组概率分布的中心,集中趋势...,而方差衡量的是,各个观察值之间的变化

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