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Find the Control Limits

The number of defective items counted in a batch of 250 is on an average found to be 28. The Control Limits are OPTIONS 13, 45 10, 40 9, 36 11, 44 ANSWER 13,45 EXPLANATION Using np chart calculations, the Control Limits are 13,45.
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Find the Control Limits

OPTIONS 0.12, 0.270.15, 0.300.20, 0.400.22, 0.44 ANSWER 0.12, 0.27 EXPLANATION Using p chart calculations the control limits 0.12, 0.27.
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The main reason of preferring an Individuals over an Averages charts is

OPTIONS Need to collect lesser samples Process shifts detected easily Additional sensitivity by averages charts not justified Process drifts detected easily Correct Option:A Need to collect lesser samples EXPLANATION Plots individual observations (I chart) and moving ranges (MR chart) over time for variables data. Use...
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What is the major benefit of using Xbar charts over Individuals charts?

OPTIONS The Average charts are not sensitive to non-normality The Average charts provide tighter controls Average charts best indicate within and between subgroup variation Average charts show mean shift ANSWER The Average charts provide tighter controls EXPLANATION Xbar charts have tighter controls than the I-MR...
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