弗萊兄弟暖氣空調(diào)公司，雇傭了Larry Clark 和George Murnen 兩位員工從事客服工作，公司經(jīng)理Tom Fry對他們每日接到的電話進行了統(tǒng)計。對α＝0.05，檢驗平均接到的電話數(shù)是否有差異。
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