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If a process has subgroups for Variable data and the process runs for a long period of time, then the best pair of SPC Charts to use would be an Xbar and _________.
A. NP Chart is for attribute data and not for variable data.
B. Individual Chart is used for variable data but only when you have just 1 subgroup.
D. C Chart is used for attribute data and not for variable data.
C. R chart is the only option in the list that can be used with variable data and when you have more than 1 subgroup. If you read carefully, the question says "If a process has subgroups".
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10 months, 3 weeks ago