$6\mathrm{.}34.$ Specifications on a cigar lighter detent are $0\mathrm{.}3220$

and $0\mathrm{.}3200$ in$.$ Samples of size $5$ are taken every $45$

min with the results shown in Table $6$E$.17($measured

as deviations from $0\mathrm{.}3210$ in $0\mathrm{.}0001in.).$

$($a$)$ Set up an $R$ chart and examine the process for

statistical control.

$($b$)$ What parameters would you recommend for an

$R$ chart for on$-$line control?

$($c$)$ Estimate the standard deviation of the process.

$($d$)$ What is the process capability?