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SS组内 = SS总 – SS组间
= 7881.87-2384.026 =5497.84
υ总= N – 1 = 30 –1 = 29
υ组间= k - 1 = 3 –1 = 2
υ组内= N – k = 30 –3= 27
MS组间= SS组间/υ组间= 2384.026/2 = 1192.013
MS组内= SS组内/υ组内= 5497.84/27 = 203.62
F = MS组间 / MS组内= 1192.013/203.62 = 5.854
3、确定P值和作出结论
υ1 =2, υ2 =27,查F 界值表
F0.05(2,27)=3.35 < F=5.8540,
故P<0.05 ,拒绝H0,接受H1
可以认为三种人的载脂蛋白不同。 |