inferencetestofdifferenceofmeans-anderson5：推理測(cè)試方式的差異-安德森-資料下載頁(yè)
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【正文】 difference in the amounts earned by males and females. Pooling the Data ? If you prove the standard deviations are equal then you can pool the data together. ? You don’t want to do this….it’s another type of hypothesis test to prove standard deviations equal ? Never Pool! The Formula Sheet If you bought a used camera in good condition from a friend, would you pay the same as you would if you bought the same item from a stranger. Friend Stranger 275 260 300 250 260 175 300 130 255 200 275 225 290 240 300 Don’t fet the boxplot to show normal! Homework ? Worksheet 1
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