Question: Fujiyama Electronics needs to construct x - and s - charts for circuit boards that are purchased from an outside supplier. A critical dimension is

Fujiyama Electronics needs to construct

\overset{}{x} -

and s

-

charts for circuit boards that are purchased from an outside supplier. A critical dimension is the distance between two holes on the board that are supposed to be

5 c m .

apart. Use the data, consisting of

30

samples of size

4

found in C

08

Data.xlsx in the worksheet Prob.

8 - 34 .

.

Compute the mean and standard deviation of each sample, calculate control limits

,

and plot them on control charts.

.

Does the process appear to be in statistical control? Why or why not? What recommendation would you make to management concerning the process?

Fujiyama Electronics needs to construct x- and s-charts for circuit boards

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