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If X-double bar = 20, n =4, R-bar= 0.5, and x-bar from a sample is 19.735, then it indicates that for that sample the process

If X-double bar = 20, n =4, R-bar= 0.5, and x-bar from a sample is 19.735, then it indicates that for that sample the process is (consider x-bar chart only)

a.

out of control

b.

in control

c.

not enough information is given to answer the question

d.

none of the above

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