Minitba15高手帮忙分析一下R&R

大家帮忙看一下操作和数据有什么问题，为什么结果总是不对。
MTB里的输入如下：
零件号 测量者 数据
1 A 7.972
1 B 7.963
1 C 7.964
2 A 7.961
2 B 7.947
2 C 8.000
3 A 7.980
3 B 7.972
3 C 7.985
4 A 7.991
4 B 7.964
4 C 7.975
5 A 7.978
5 B 7.972
5 C 7.950
6 A 7.968
6 B 7.991
6 C 7.947
7 A 7.942
7 B 7.976
7 C 7.997
8 A 7.962
8 B 7.981
8 C 7.974
9 A 8.000
9 B 7.952
9 C 7.968
10 A 7.971
10 B 8.000
10 C 7.974
1 A 7.978
1 B 7.962
1 C 7.965
2 A 7.959
2 B 7.947
2 C 8.003
3 A 7.982
3 B 7.975
3 C 7.981
4 A 7.996
4 B 7.968
4 C 7.975
5 A 7.974
5 B 7.972
5 C 7.958
6 A 7.966
6 B 7.993
6 C 7.947
7 A 7.944
7 B 7.972
7 C 7.995
8 A 7.968
8 B 7.982
8 C 7.971
9 A 8.003
9 B 7.956
9 C 7.962
10 A 7.978
10 B 8.001
10 C 7.973
1 A 7.977
1 B 7.968
1 C 7.966
2 A 7.957
2 B 7.943
2 C 8.001
3 A 7.982
3 B 7.976
3 C 7.984
4 A 7.991
4 B 7.969
4 C 7.974
5 A 7.970
5 B 7.976
5 C 7.952
6 A 7.968
6 B 7.995
6 C 7.942
7 A 7.947
7 B 7.971
7 C 7.992
8 A 7.966
8 B 7.985
8 C 7.974
9 A 8.001
9 B 7.959
9 C 7.962
10 A 7.977
10 B 8.005
10 C 7.971