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  • standard deviation above the average score”

    standard deviation above the average score”
    explain what“1 standard deviation above the average score"means。
    能用英語回答就更好了,
    英語人氣:850 ℃時間:2020-04-23 12:03:23
    優(yōu)質(zhì)解答
    "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.
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