A process is in control at X-double bar = 100, R-bar = 7.3 with n = 4. If the process level
shifts to 101.5, with the same R-bar, what is the
probability that the next X-bar point will fall
outside the old control limits:
a. 0.016
b. 0.029
c. 0.122
d. 0.360

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