Author Question: An x-bar control chart was examined and no data points fell outside of the limits. Can this process ... (Read 35 times)

saliriagwu · **on:** Dec 3, 2019

Question 1

Ten samples of a process measuring the number of returns per 100 receipts were taken for a local retail store. The number of returns were 10, 9, 11, 7, 3, 12, 8, 4, 6, 11. Find the standard deviation of the sampling distribution. (Hint- Use p-bar formula)
◦ .0273
◦ 8.1
◦ .0863
◦ There is not enough information.
◦ .081

Question 2

An x-bar control chart was examined and no data points fell outside of the limits. Can this process be considered in control?
◦ No, the number of samples must be known.
◦ Yes.
◦ Yes, there is not enough data to determine otherwise.
◦ No, there could be a pattern to the points, the R-chart must be checked.
◦ Yes, it is unlikely that there is a pattern in these points.

lin77x · **Reply #1 on:** Dec 3, 2019

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