SPC的相关问题

这是我厂生产的烟用滤棒的测试数据，每十个样本为一组共测了76组，圆周规格是24.1-----24.5 原始数据如下,做能力分析cpk =1.76 ppk=1.33 可在MINITAB中做X---S图时确有很多超点这是为什么?
圆周
24.29
24.30
24.30
24.30
24.32
24.32
24.32
24.32
24.34
24.36
24.25
24.25
24.27
24.27
24.30
24.30
24.30
24.31
24.32
24.36
24.32
24.32
24.34
24.35
24.35
24.36
24.37
24.38
24.38
24.40
24.30
24.33
24.34
24.35
24.36
24.36
24.36
24.37
24.38
24.40
24.27
24.28
24.29
24.30
24.30
24.30
24.31
24.33
24.33
24.34
24.28
24.28
24.29
24.29
24.30
24.30
24.30
24.32
24.32
24.33
24.28
24.29
24.29
24.29
24.29
24.30
24.31
24.31
24.32
24.32
24.30
24.31
24.32
24.32
24.32
24.32
24.32
24.33
24.33
24.36
24.29
24.30
24.31
24.32
24.32
24.33
24.33
24.33
24.34
24.35
24.23
24.25
24.26
24.26
24.27
24.28
24.29
24.30
24.30
24.32
24.24
24.26
24.27
24.28
24.29
24.29
24.31
24.31
24.32
24.33
24.20
24.21
24.21
24.23
24.24
24.25
24.25
24.26
24.26
24.28
24.25
24.26
24.26
24.26
24.26
24.27
24.28
24.28
24.29
24.30
24.29
24.29
24.30
24.30
24.30
24.30
24.31
24.32
24.32
24.35
24.18
24.20
24.22
24.23
24.24
24.24
24.25
24.25
24.26
24.26
24.28
24.28
24.28
24.28
24.28
24.30
24.31
24.31
24.31
24.33
24.28
24.29
24.29
24.31
24.31
24.31
24.31
24.31
24.32
24.34
24.24
24.24
24.25
24.25
24.25
24.25
24.26
24.27
24.29
24.29
24.26
24.26
24.26
24.27
24.27
24.28
24.29
24.30
24.30
24.33
24.25
24.25
24.26
24.27
24.28
24.30
24.30
24.31
24.31
24.32
24.30
24.31
24.31
24.31
24.32
24.32
24.33
24.33
24.34
24.35
24.25
24.27
24.27
24.29
24.29
24.29
24.30
24.31
24.35
24.35
24.27
24.28
24.28
24.30
24.31
24.31
24.32
24.32
24.33
24.34
24.27
24.29
24.31
24.32
24.33
24.33
24.33
24.34
24.35
24.35
24.26
24.27
24.28
24.28
24.28
24.28
24.29
24.31
24.32
24.32
24.27
24.28
24.29
24.30
24.30
24.32
24.32
24.33
24.34
24.35
24.28
24.28
24.29
24.30
24.30
24.30
24.31
24.32
24.35
24.35
24.28
24.29
24.30
24.31
24.32
24.32
24.33
24.33
24.33
24.34
24.26
24.26
24.26
24.27
24.28
24.28
24.28
24.28
24.29
24.31
24.26
24.26
24.27
24.28
24.28
24.28
24.29
24.29
24.29
24.31
24.25
24.27
24.27
24.27
24.28
24.28
24.29
24.30
24.31
24.32
24.26
24.27
24.27
24.28
24.29
24.31
24.32
24.32
24.33
24.35
24.28
24.28
24.28
24.29
24.29
24.30
24.32
24.32
24.35
24.36
24.22
24.27
24.27
24.28
24.28
24.29
24.30
24.31
24.32
24.35
24.24
24.28
24.28
24.28
24.28
24.29
24.29
24.32
24.33
24.33
24.28
24.29
24.31
24.31
24.32
24.32
24.33
24.33
24.34
24.35
24.25
24.26
24.26
24.27
24.29
24.29
24.29
24.30
24.32
24.35
24.25
24.25
24.26
24.28
24.28
24.28
24.29
24.30
24.30
24.33
24.23
24.24
24.25
24.26
24.27
24.29
24.29
24.30
24.32
24.35
24.28
24.29
24.30
24.31
24.31
24.32
24.34
24.35
24.35
24.36
24.26
24.30
24.31
24.32
24.33
24.33
24.35
24.35
24.36
24.37
24.25
24.25
24.25
24.26
24.27
24.27
24.27
24.27
24.28
24.32
24.23
24.24
24.25
24.25
24.25
24.25
24.26
24.26
24.27
24.28
24.26
24.27
24.27
24.27
24.28
24.29
24.29
24.29
24.30
24.30
24.24
24.24
24.26
24.27
24.28
24.28
24.29
24.29
24.29
24.30
24.28
24.28
24.29
24.30
24.30
24.31
24.31
24.31
24.32
24.35
24.25
24.26
24.27
24.27
24.29
24.29
24.29
24.30
24.30
24.31
24.25
24.26
24.27
24.27
24.29
24.29
24.29
24.30
24.31
24.31
24.29
24.30
24.30
24.30
24.31
24.31
24.31
24.31
24.34
24.34
24.28
24.30
24.30
24.31
24.31
24.31
24.32
24.33
24.33
24.33
24.27
24.27
24.28
24.29
24.30
24.32
24.32
24.32
24.33
24.35
24.28
24.29
24.30
24.30
24.30
24.31
24.32
24.33
24.33
24.34
24.25
24.27
24.27
24.28
24.29
24.30
24.30
24.31
24.32
24.33
24.22
24.24
24.24
24.24
24.25
24.25
24.25
24.25
24.26
24.28
24.21
24.22
24.24
24.24
24.26
24.26
24.28
24.28
24.30
24.31
24.29
24.30
24.31
24.33
24.33
24.33
24.35
24.36
24.37
24.37
24.23
24.26
24.26
24.27
24.29
24.29
24.29
24.30
24.30
24.31
24.25
24.25
24.26
24.27
24.27
24.28
24.28
24.28
24.29
24.29
24.28
24.29
24.29
24.29
24.30
24.30
24.31
24.31
24.31
24.31
24.25
24.27
24.27
24.27
24.28
24.28
24.28
24.28
24.29
24.29
24.31
24.31
24.32
24.32
24.33
24.33
24.33
24.33
24.33
24.34
24.28
24.28
24.29
24.29
24.29
24.30
24.30
24.31
24.31
24.33
24.25
24.25
24.26
24.27
24.28
24.28
24.28
24.29
24.29
24.30
24.27
24.28
24.28
24.29
24.29
24.29
24.30
24.30
24.31
24.31
24.27
24.28
24.29
24.30
24.30
24.30
24.30
24.31
24.31
24.31
24.28
24.28
24.29
24.29
24.30
24.31
24.32
24.33
24.33
24.34
24.28
24.31
24.32
24.33
24.33
24.33
24.33
24.34
24.34
24.34
24.23
24.28
24.30
24.30
24.31
24.32
24.32
24.32
24.33
24.34
24.27
24.28
24.29
24.29
24.30
24.30
24.31
24.31
24.31
24.32
24.24
24.24
24.25
24.25
24.26
24.27
24.28
24.28
24.28
24.31
24.27
24.27
24.28
24.28
24.30
24.30
24.30
24.31
24.32
24.32
24.28
24.28
24.28
24.29
24.29
24.29
24.30
24.31
24.32
24.33
24.26
24.26
24.27
24.27
24.27
24.28
24.28
24.28
24.30
24.33
24.27
24.28
24.28
24.28
24.28
24.29
24.29
24.30
24.30
24.31
24.24
24.24
24.25
24.26
24.26
24.27
24.28
24.30
24.30
24.31
24.21
24.22
24.23
24.24
24.24
24.25
24.26
24.29
24.29
24.29
24.23
24.24
24.24
24.24
24.25
24.25
24.26
24.26
24.27
24.31
24.21
24.23
24.24
24.25
24.25
24.26
24.27
24.27
24.29
24.30
24.24
24.25
24.26
24.26
24.26
24.26
24.26
24.27
24.27
24.31
24.18
24.19
24.22
24.24
24.25
24.25
24.25
24.26
24.27
24.28
24.23
24.28
24.28
24.29
24.29
24.30
24.31
24.31
24.35
24.36
24.26
24.27
24.29
24.30
24.30
24.31
24.32
24.33
24.33
24.34
24.25
24.26
24.27
24.27
24.28
24.30
24.30
24.31
24.34
24.35
24.22
24.22
24.23
24.23
24.24
24.24
24.25
24.26
24.28
24.28
24.13
24.21
24.21
24.21
24.22
24.23
24.23
24.23
24.24
24.24
24.24
24.27
24.27
24.28
24.28
24.28
24.28
24.29
24.30
24.30
24.29
24.29
24.30
24.30
24.31
24.31
24.31
24.33
24.34
24.34
24.29
24.30
24.30
24.30
24.31
24.32
24.32
24.33
24.35
24.35
24.24
24.25
24.25
24.27
24.27
24.27
24.28
24.28
24.29
24.30
24.28
24.28
24.29
24.29
24.29
24.30
24.30
24.31
24.32
24.32
24.26
24.26
24.26
24.27
24.28
24.30
24.31
24.32
24.32
24.33
24.23
24.24
24.25
24.26
24.28
24.28
24.28
24.29
24.30
24.30
24.23
24.23
24.24
24.25
24.25
24.25
24.26
24.26
24.28
24.30
24.26
24.28
24.28
24.29
24.30
24.30
24.30
24.31
24.31
24.35
24.20
24.23
24.24
24.24
24.24
24.25
24.25
24.25
24.25
24.27
24.28
24.28
24.28
24.29
24.29
24.30
24.30
24.32
24.33
24.34
24.24
24.24
24.25
24.26
24.26
24.27
24.27
24.27
24.27
24.28
24.22
24.25
24.25
24.26
24.27
24.28
24.28
24.31
24.31
24.33
24.26
24.27
24.27
24.27
24.28
24.29
24.29
24.30
24.31
24.33
24.25
24.26
24.28
24.28
24.28
24.30
24.31
24.32
24.32
24.33
24.26
24.26
24.27
24.27
24.27
24.28
24.29
24.29
24.30
24.36
24.26
24.27
24.28
24.29
24.30
24.31
24.31
24.32
24.33
24.34
24.25
24.28
24.29
24.30
24.31
24.31
24.31
24.32
24.34
24.37
24.23
24.26
24.26
24.27
24.27
24.31
24.32
24.34
24.34
24.35
24.26
24.28
24.29
24.30
24.30
24.32
24.32
24.33
24.35
24.38
24.25
24.27
24.30
24.31
24.31
24.32
24.32
24.32
24.32
24.37
24.24
24.25
24.26
24.27
24.28
24.29
24.29
24.29
24.31
24.32
24.23
24.25
24.26
24.26
24.27
24.27
24.28
24.29
24.29
24.32
24.28
24.28
24.29
24.29
24.30
24.31
24.32
24.32
24.32
24.34
24.26
24.27
24.27
24.28
24.29
24.29
24.29
24.31
24.32
24.32
24.23
24.26
24.26
24.27
24.27
24.28
24.29
24.30
24.30
24.32
24.27
24.29
24.30
24.31
24.31
24.31
24.31
24.32
24.33
24.34
24.24
24.24
24.24
24.26
24.26
24.26
24.27
24.30
24.31
24.34
24.26
24.28
24.29
24.29
24.30
24.30
24.32
24.32
24.33
24.33
24.22
24.23
24.26
24.26
24.28
24.29
24.30
24.31
24.31
24.35
24.29
24.29
24.29
24.30
24.30
24.31
24.31
24.32
24.34
24.34
24.28
24.29
24.29
24.30
24.30
24.31
24.33
24.34
24.34
24.37
24.29
24.29
24.32
24.32
24.33
24.33
24.34
24.34
24.35
24.38
24.25
24.26
24.26
24.27
24.29
24.29
24.30
24.30
24.31
24.31
24.25
24.28
24.29
24.29
24.29
24.30
24.31
24.32
24.33
24.35
24.28
24.29
24.29
24.30
24.31
24.31
24.31
24.32
24.33
24.35
24.29
24.31
24.31
24.33
24.34
24.34
24.34
24.34
24.36
24.38
24.26
24.27
24.31
24.31
24.31
24.32
24.32
24.34
24.35
24.39
24.27
24.28
24.28
24.29
24.29
24.30
24.30
24.32
24.33
24.34
24.29
24.30
24.31
24.31
24.31
24.33
24.33
24.34
24.34
24.34
24.26
24.29
24.29
24.30
24.30
24.30
24.31
24.31
24.32
24.34
24.29
24.30
24.30
24.30
24.30
24.31
24.31
24.32
24.32
24.34
24.26
24.28
24.29
24.30
24.33
24.34
24.34
24.34
24.34
24.38
24.29
24.30
24.32
24.34
24.34
24.34
24.35
24.35
24.36
24.38
24.26
24.26
24.27
24.28
24.29
24.29
24.30
24.30
24.31
24.31
24.27
24.28
24.30
24.31
24.31
24.32
24.33
24.34
24.34
24.36
24.26
24.26
24.28
24.29
24.30
24.30
24.30
24.31
24.32
24.33
24.25
24.26
24.27
24.27
24.27
24.28
24.28
24.30
24.32
24.33
24.24
24.24
24.25
24.26
24.26
24.26
24.28
24.28
24.30
24.31
24.24
24.25
24.26
24.26
24.27
24.27
24.28
24.29
24.29
24.29
24.28
24.30
24.30
24.31
24.31
24.32
24.32
24.32
24.33
24.34
24.27
24.27
24.27
24.28
24.29
24.29
24.30
24.30
24.35
24.35
24.24
24.24
24.25
24.27
24.27
24.27
24.28
24.30
24.31
24.31
24.18
24.19
24.21
24.22
24.22
24.23
24.24
24.26
24.26