Q1[10 pts]. Computer upgrades have a targeted time of 80 minutes. Six samples of 5 observations each have been taken, and the results are listed below. Determine the appropriate 98% control chart(s)...

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Question

Q1[10 pts]. Computer upgrades have a targeted time of 80 minutes. Six samples of 5 observations each have been taken, and the

Answer 1

Answer #1

In X chart ,

UCLx=Xdbar +z*std dev

LCLx=Xdbar -z*std dev

Xbar bar =Average of all the sample means=AVERAGE(B9:G9)=80.083

For 98% ,z=NORMSINV(0.98)=2.053

UCLx=B11+B10*C13=81.78

LCLx=B11-C13*B10=78.39

All the xbar values lie within the control limits and hence the process is in control.

fB12+C15*B13 B17 Samples 2 Observations 79.4 79 79 80.9 78.9 79.5 79.3 80.1 79.9 81.1 80.4 4 2 79.6 78.2 80.4 81 80.2 80.5 80

Answer 2

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