200个数据，正态的，达到4.2就为合格，西格玛水平

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200个数据，正态的，达到4.2就为合格， 有130个数据是合格的，查表西格玛水平为1.9，而用MINITAB做出来是0.37，为什么？




2.991277127
3.258972834
3.43070733
3.494876198
3.510849747
3.570706648
3.613704145
3.621551535
3.659747657
3.660549964
3.667460961
3.67203205
3.674640942
3.680343512
3.703778492
3.712395956
3.729074275
3.745929043
3.748627097
3.763720061
3.780916762
3.786583954
3.793781122
3.794011883
3.812015095
3.816989046
3.839561858
3.840943349
3.860326264
3.8613569
3.872655566
3.873345072
3.880566127
3.886778209
3.904129347
3.906328011
3.906557765
3.914367785
3.927373747
3.928503871
3.938516988
3.961173071
3.962470259
3.969314986
3.971243138
3.980745294
3.99915267
4.004391851
4.004534001
4.015712032
4.016134892
4.0312262
4.043869712
4.045145199
4.056455021
4.058546479
4.084947729
4.086507235
4.087522951
4.092997158
4.095514209
4.104988104
4.114925107
4.163005598
4.169549077
4.172925463
4.181150773
4.184719143
4.198478622
4.199964545
4.218609385
4.218733936
4.219601681
4.219990241
4.22438754
4.229758284
4.233172819
4.236189178
4.24483708
4.24705812
4.251284458
4.253391561
4.25489821
4.25532954
4.2654048
4.26824028
4.269421129
4.28734606
4.287558903
4.291875026
4.293268059
4.300392683
4.319122757
4.320699641
4.334261528
4.334899309
4.350197942
4.352841087
4.354967662
4.356602614
4.363167188
4.366845034
4.372863447
4.384233069
4.393055603
4.403120985
4.410798703
4.417205079
4.420622563
4.421602581
4.422153656
4.428615042
4.443513188
4.447166291
4.449392289
4.454170028
4.45429016
4.459327125
4.470135772
4.475213287
4.4869887
4.489819522
4.491971293
4.502330086
4.505592712
4.510766212
4.517669681
4.518548875
4.526994556
4.537258006
4.54337218
4.547520205
4.548619438
4.557465262
4.558530788
4.57461163
4.607153136
4.614533105
4.616950441
4.634318511
4.638182547
4.643064481
4.644114068
4.651677941
4.654602043
4.659714084
4.675767498
4.694174321
4.70922869
4.721240826
4.722485611
4.734561734
4.736162951
4.742944893
4.751679023
4.7550224
4.759875921
4.785857479
4.788570483
4.804604105
4.816596978
4.825569399
4.827720325
4.829904853
4.834071554
4.843656492
4.859924784
4.885011091
4.885428964
4.899776894
4.902435989
4.913818449
4.932777837
4.934867834
4.942116097
4.954140219
4.955346865
4.95592165
4.980556576
5.0352832
5.038350446
5.045399051
5.070466063
5.072161798
5.093262847
5.116011541
5.125065521
5.174252484
5.189716976
5.19283212
5.240173063
5.276597629
5.281446075
5.292537849
5.4252383
5.454058283
5.475940494
5.585912629
5.614149408
5.885703094