老婆寫的老公退貨申請書,太有才了!
New View of Statistics: Mean & SD or SEM? 最近,網絡上掀起了一股退貨風潮。這本來不是啥稀奇的事,但是,這一回確實讓 一路哥大開眼界了! 事情是這樣的,有一對新婚夫妻才結婚沒幾天,就鬧到要離婚,媳婦要把剛嫁的男人退貨,她還寫了一個退貨申請書。一路哥看了只有佩服,現在分享出來讓大家看看! MEAN ± SD or MEAN ± SEM? The standard deviation (SD) represents variation in the values of a variable, whereas the standard error of the mean (SEM) represents the spread that the mean of a sample of the values would have if you kept taking samples. So the...
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