全家桶不夠全家吃!美國老太索賠1.4億,肯德基的回應亮了...
New View of Statistics: Mean & SD or SEM?美國的一名64歲的老太太Anna Wurtzburge在肯德基買了炸雞全家桶,回家後,發現炸雞的量跟廣告顯示的塞滿整個桶大有出入。 她稱:「 我回到家後說炸雞在哪兒?我以為炸雞分量夠吃多餐……他們(廣告)稱夠一家人吃,在廣告里的炸雞放滿一整桶,但實際上只有半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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