For the data given in Figure 12-A, estimate the mean and standard deviation for the process from which these samples were drawn (i.e., the parent population) and discuss the process capability in terms of Cp, Cpk and D. The USL and LSL for this dimension are 0.9 and 0.5, respectively, and the nominal is 0.7.

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U.C.L L.C AveragesX bar chart 95 30 90 70 LC Ranges IR chart 50 ·3D 20 10 65 75 75 60 706075 80 655080 85 70 55 90 75 75 7565 60 50 60 80 66 65 65 75 80 70 85 75 65 80 85 0 90 86 75 85 90 75 85 0 86 65 65 75 86 70 Sum 2.86 3 20 305 2 6 80 766 Higest 0 010 20 265 20 For sampleSzen of less than seven, there is no lowor control limit for ranges For firat subgroup Sum 55-70+65+66 2.55 FIGURE 12-A