Given the data below, a lower specification of 52.8, and an upper specification of 72.2, what is the long term process performance (Ppk)? Please provide answer to at least 3 significant digits.
Data
50.65897
56.33776
55.34139
67.1965
64.90829
49.54292
50.85892
53.96954
57.93657
52.40427
56.36876
52.91792
63.24705
55.3842
58.26031
59.06518
64.87003
43.09846
52.72188
49.80689
42.68165
53.95463
59.33698
64.51836
61.96437
59.39377
49.07404
57.32518
59.24585
56.47081
49.56036
57.80438
65.01286
53.66745
64.72979
54.76287
58.44208
53.61521
55.92805
67.20384
63.03314
53.92972
48.73767
62.77028
52.02327
64.74119
57.90265
58.90756
56.24994
51.64714
56.07373
51.80891
58.27996
60.89981
47.46107
58.80604
63.32584
58.77927
63.62562
51.87492
50.03547
55.9483
59.36296
54.88555
56.17097
57.35891
61.02401
57.74539
49.17879
55.02807
53.2587
54.86517
52.45778
55.00887
58.07161
51.55725
48.79924
46.79783
62.91168
59.7879
53.15539
50.74708
52.36123
53.51528
62.67593
69.52522
55.75124
66.27428
64.49284
52.90177
59.09449
58.92027
55.4837
60.42112
45.53706
65.39294
66.94343
56.60848
56.31931
58.53345
57.02959
51.2981
50.93171
44.15923
53.4677
61.396
55.52753
57.79547
47.02811
52.34561
53.22906
54.2459
61.22922
51.54712
51.32517
50.75065
63.88015
56.28699
The detailed solution is given in the pictures below.
Please go through them carefully specially the notations.
Hope the solution helps. Thank you.
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