Question $4(5$ points$)$

Is the X$-$bar chart in control?

Question $4$ options:

The X$-$bar chart is in control

The X$-$bar chart is NOT in control

There is not enough information provided to answer the question

Question $5(20$ points$)$

What is the center line for the R chart?

Question $5$ options:

$5\mathrm{.}92$

$3\mathrm{.}78$

$2\mathrm{.}29$

$7\mathrm{.}24$

$3\mathrm{.}99$

$1\mathrm{.}44$

$4\mathrm{.}81$