Question

Need help doing 28.3 and 28.4!

28. Consider the following table: Part Test 1 Test 2 Test 3 X-bar 1 383.75 373.75 446.25 401.25 72.5 125 2 406.25 531.25 3 368.75 5 457.5 270 398.75 345.8333 128.75 401.5278 108.75 Averages 28.1 Set up the control limits for an X-bar and R Chart for the table above. 28.2 If the specifications are set at 435 t 45, and the process output is normally distributed, estimate the fraction nonconforming. 28.3 If the process mean shifts to 415 and the standard deviation simultaneously shifts to 10. Find the probability of detecting this shift on the X-bar chart on the first subsequent sample. 28.4 For the shift in 28.3, find the average run length to detect the shift.

Answer 1

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