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【正文】 機床加工的軸有分析兩臺機床加工的軸有無明顯差異無明顯差異機床甲機床甲 :機床乙機床乙 :輸入數(shù)據(jù)于兩列中輸入數(shù)據(jù)于兩列中Twosample T for C1 vs C2n N Mean StDev SE Meann C1 8 n C2 7 n Difference = mu (C1) mu (C2)n Estimate for difference: n 95% CI for difference: (, )n TTest of difference = 0 (vs not =): TValue = PValue = DF = 12n 由于假設(shè)兩均值相等由于假設(shè)兩均值相等 ,差為差為 0,在在 (, )中中 ,故可故可認(rèn)為二者均值無明顯差異認(rèn)為二者均值無明顯差異假設(shè)方差未知假設(shè)方差未知 ,判斷兩個總體的方差是否相等判斷兩個總體的方差是否相等 ,即尺寸離散度是否相同即尺寸離散度是否相同謝謝觀看 /歡迎下載BY FAITH I MEAN A VISION OF GOOD ONE CHERISHES AND THE ENTHUSIASM THAT PUSHES ONE TO SEEK ITS FULFILLMENT REGARDLESS OF OBSTACLES. BY FAITH I BY FAITH
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