A Production Process That Is in Control Has a Mean $\mu$

question 55

Essay

A production process that is in control has a mean ( $\mu$ ) of 80 and a standard deviation ( $\sigma$ ) of 10.
a.Determine the upper and the lower control limits for sample sizes of 25.
b.Five samples had means of 81, 84, 75, 83, and 79. Construct an x-bar chart and explain whether or not the process is in control.

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