Question: If a process has only random variations (it is in control), then 95.5% of the time the sample averages will fall within a. 1 standard

If a process has only random variations (it is in control), then 95.5% of the time the sample averages will fall within

a. 1 standard deviation of the population mean.

b. 2 standard deviations of the population mean.

c. 3 standard deviations of the population mean.

d. 4 standard deviations of the population mean.

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