Compute the mean and standard deviation of the data

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Reference no: EM132280048

Wilmer Machine Shop Observations Sample No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 X1 3.55 3.61 3.61 4.13 4.06 4.48 3.25 4.25 4.35 3.62 3.09 3.38 2.85 3.59 3.6 2.69 3.07 2.86 3.68 2.9 3.57 2.82 3.82 3.14 3.97 3.77 4.12 3.92 3.5 4.23 4.37 4.07 4.34 3.61 3.07 3.71 3.51 3 3.2 3.68 X2 3.64 3.42 3.36 3.5 3.28 4.32 3.58 3.38 3.64 3.61 3.28 3.15 3.44 3.61 2.83 3.57 3.18 3.69 3.59 3.41 3.63 3.55 2.91 3.83 3.34 3.6 3.38 3.6 4.08 3.62 3.62 3.09 3.38 2.85 3.59 3.6 2.69 3.07 2.86 3.68 X3 4.37 4.07 4.34 3.61 3.07 3.71 3.51 3 3.2 3.43 3.12 3.09 4.06 3.34 2.84 3.28 3.11 3.05 3.93 3.37 2.72 3.56 3.8 3.8 3.65 3.81 3.37 3.54 4.09 3 4.37 4.07 4.34 3.61 3.07 3.71 3.51 3 3.2 3.43 Mean Range St Dev Forty samples of size 3 were taken from a Wilmer Machine Shop machining process over a 20-hour period. These data can be found online. a. Compute the mean and standard deviation of the data b. Compute the mean and range of each sample and plot them on control charts. Does the process appear to be in statistical control? Why or why not?

Reference no: EM132280048

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