Table $5\mathrm{.}1$

Source: $1950$ ASTM Manual on Quality Control of Materials, copyright American Society for Testing Materials. Reprinted with permission.

Historically, the average diameter of the holes drilled has been $0\mathrm{.}25$ cm and the average range has been $0\mathrm{.}1$ cm$.$ Determine the central line and upper and lower control limits for an and an R$-$chart, assuming samples of size $8$ will be taken. Use Table $5\mathrm{.}1.$ For the R$-$chart, what is the value of the LCLR$?$

Less than or equal to $0\mathrm{.}010$

Greater than $0\mathrm{.}010$ but less than or equal to $0\mathrm{.}020$

Greater than $0\mathrm{.}020$ but less than or equal to $0\mathrm{.}030$

Greater than $0\mathrm{.}030$