mean average n
平均n
以上为机器翻译结果,长、整句建议使用 人工翻译 。
The population mean is often written "x-bar." If you have a sample with n observations, it's the summation i = 1 to n of xi/n--that's the average.
人口均值经常写成“x-条形柱”,如果你有一个样本有n个观测者,是从 i=1到n和的xi/n,这是平均值。
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