standard deviation above the average score”explain what“1 standard deviation above the average score"means。能用英语回答就更好了，

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standard deviation above the average score”explain what“1 standard deviation above the average score
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standard deviation above the average score”explain what“1 standard deviation above the average score"means。能用英语回答就更好了，
standard deviation above the average score”
explain what“1 standard deviation above the average score"means。
能用英语回答就更好了，

standard deviation above the average score”explain what“1 standard deviation above the average score"means。能用英语回答就更好了，
"1 standard deviation above the average score" means that the observation value minus the population mean just equals to 1 standard deviation.The average score is the population mean.
Assume a observation selected from a population follows normal distribution (u,s^2) is x,we can calculate its Z-score = (x-u)/s = n,and we say that the observation value is n standard deviation above (positive n) or below (negative n) the average score.

统计学里，计算z-score，就是标准计分的公式为(x-population mean)/standard deviation
就是 （计算的样本对象 减去 总体期望） 再除以 总体标准差。
公式表示样本在总体中的位置。
z-score=0表示恰好处于总体正态分布的中央位置，数值恰好等于数学期望。
z-score=1就表示你问的“1 standard deviati...

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统计学里，计算z-score，就是标准计分的公式为(x-population mean)/standard deviation
就是 （计算的样本对象 减去 总体期望） 再除以 总体标准差。
公式表示样本在总体中的位置。
z-score=0表示恰好处于总体正态分布的中央位置，数值恰好等于数学期望。
z-score=1就表示你问的“1 standard deviation above the average score”了.....相当于“计算对象比数学期望高出一个标准差”的意思。
其实你把算z-score的公式中standard deviation乘到z-score一边，就能看出来了是不、

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