cpk计算时显示*，如何才能显示正常数值，请高手赐教，非常感谢

spec >1.44
1.288928571
1.037857143
1.592872093
1.616376712
1.598757143
1.621722892
1.639985401
1.480089041
1.725811189
1.51240411
1.647938356
1.569636364
1.610240964
1.749628571
1.783424658
1.767863014
1.6653875
1.784779412
1.790945205
1.709317073
1.783972603
1.668473282
1.801623288
1.753957983
1.846576642
1.784921429
1.668716418
1.675358696
1.636328571
1.67154918
1.850075342
1.813739726
1.775890411
1.806643836
1.841773973
1.765054795
1.810061644
1.89310274
1.778237762
1.800748252
1.771071429