QUESTION $2$

Find the overall mean and the average range of the packaging process.

A$)0$ and $6\mathrm{.}4$

B$)0$ and $6\mathrm{.}8$

C$)18\mathrm{.}8$ and $22\mathrm{.}8$

D$)20\mathrm{.}8$ and $3$

E$)20\mathrm{.}8$ and $2\mathrm{.}8$

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Find the lower and upper control limits of the sample mean control chart.

A$)0$ and $6\mathrm{.}4$

B$)0$ and $6\mathrm{.}8$

C$)18\mathrm{.}8$ and $22\mathrm{.}8$

D$)20\mathrm{.}8$ and $3$

E$)20\mathrm{.}8$ and $2\mathrm{.}8$

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Find the lower and upper control limits of the R$-$control chart.

A$)0$ and $6\mathrm{.}4$

B$)0$ and $6\mathrm{.}8$

C$)18\mathrm{.}8$ and $22\mathrm{.}8$

D$)20\mathrm{.}8$ and $3$

E$)20\mathrm{.}8$ and $2\mathrm{.}8$

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Is the central tendency of the process in control, why?

A$)$ No$,$ because one or more sample means exceeded the control limits$.$

B$)$ Yes, because all sample means fall within the control limits$.$

C$)$ No$,$ because one or more of the ranges exceeded the control limits$.$

D$)$ Yes, because all of the ranges fall within the control limits$.$

E$)$ There is not enough information to make a decision.

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