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An X-Bar and R Chart with N=5 Has Been Plotted

Question 12

Multiple Choice

An X-bar and R chart with n=5 has been plotted for some time and has demonstrated random variation. Upon review of the last 30 plot points, the expected number of runs around the centerline on the X-bar chart is expected to be approximately which of the following?


A) 4
B) 9
C) 12
D) 16

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