C=(∑X)21N=(22.1)2118=27.1339 SSa=∑X2-C-29.29-27.1339=2.1561 V总=N-1=18-1=17 (∑X)} SSa陶=∑I -C-9,72+722+52-27.1339=16944 n 6 V组向=k-1=3-1=2 SS组内=SSa-SS组▣=21561-1.6944=0.4617 Y组内=W-k=18-3=15 7 吉林大学远程教育学院7 吉林大学远程教育学院 ( ) / (22.1) /18 27.1339 2 2 C =  X N = = =  - = 29.29 - 27.1339 = 2.1561 2 SS总 X C n 总 = N -1=18-1=17 27.1339 1.6944 6 9.7 7.2 5.2 ( ) 2 2 2 2 - = + + =  - =  C n X SS i i j i j 组间 n 组间 = k -1= 3-1= 2 SS组内 = SS总 - SS组间 = 2.1561-1.6944 = 0.4617 n 组内 = N - k =18-3 =15