I want to get a quick recheck of my math for this; I am trying to find CP and CpK along with Standard deviation. Can you please just review the calculation.

Cp = Upper specification - Lower specification

6

where = standard deviation of process distribution = 0.5903

Cp =3-2= .28

3.54

Cpk = Minimum of [ Lower specification, Upper specification - ]

33

where = average or mean

Cpk = 2.47-2, 3-2.47= .30Cpk = (0.2654, 0.2993) = 0.27, 0.30

Data

Bev # Min Bev 30 1.55 Bev 34 1.60 Bev 37 2.32 Bev 5 1.64 Bev 50 2.32 Bev 4 1.66 Bev 2 1.67 Bev 44 1.69 Bev 41 1.74 Bev 18 1.75 Bev 48 1.78 Bev 9 1.82 Bev 49 2.14 Bev 40 1.84 Bev 43 1.85 Bev 39 1.96 Bev 3 1.98 Bev 26 2.02 Bev 36 2.25 Bev 16 2.10 Bev 42 2.04 Bev 6 2.06 Bev 21 2.26 Bev 8 2.36 Bev 23 2.45 Bev 7 2.46 Bev 19 2.52 Bev 45 2.66 Bev 17 2.71 Bev 31 2.73 Bev 28 2.74 Bev 11 2.32 Bev 32 2.80 Bev 12 2.94 Bev 10 2.95 Bev 22 3.00 Bev 38 3.00 Bev 29 3.01 Bev 27 3.07 Bev 33 3.08 Bev 20 3.13 Bev 25 3.15 Bev 47 3.16 Bev 35 3.19 Bev 14 3.23 Bev 46 3.23 Bev 13 3.24 Bev 15 3.38 Bev 1 3.42 Bev 24 3.43