长度尺寸的CPK到底应该是多少？

长度要求（84.90mm≤长度≤85.10mm）收集了连续生产的100组数据，使用mintab16进行CPK统计，发现存在两种CPK数值，请各位确认下到底长度CPK应该是多少？
84.94
84.90
84.95
84.94
84.99
84.92
84.94
84.93
84.93
84.95
84.93
84.93
84.98
84.93
84.89
84.93
84.94
84.96
84.93
84.96
84.93
84.93
84.92
84.94
84.97
84.94
84.94
84.93
84.96
84.95
84.93
84.92
84.97
84.94
84.96
84.92
84.95
84.94
84.93
84.93
84.92
84.93
84.95
84.92
84.94
84.93
84.93
84.98
84.94
84.94
84.98
84.92
84.94
84.94
84.95
84.94
84.96
84.94
84.95
84.93
84.92
84.98
84.92
84.95
84.96
84.93
84.92
84.93
84.95
84.95
84.92
84.95
84.94
84.94
84.92
84.96
84.93
84.94
84.92
84.92
84.93
84.97
84.94
84.95
84.93
84.92
84.93
84.92
84.97
84.99
85.02
84.97
84.97
84.93
85.04
85.03
84.96
85.03
85.01
84.97