问题标题:
standarddeviationabovetheaveragescore”explainwhat“1standarddeviationabovetheaveragescore"means。能用英语回答就更好了,
问题描述:
standarddeviationabovetheaveragescore”
explainwhat“1standarddeviationabovetheaveragescore"means。
能用英语回答就更好了,
束永安回答:
"1standarddeviationabovetheaveragescore"meansthattheobservationvalueminusthepopulationmeanjustequalsto1standarddeviation.Theaveragescoreisthepopulationmean.
Assumeaobservationselectedfromapopulationfollowsnormaldistribution(u,s^2)isx,wecancalculateitsZ-score=(x-u)/s=n,andwesaythattheobservationvalueisnstandarddeviationabove(positiven)orbelow(negativen)theaveragescore.
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