in each sample. Edith has also calculated sample means and sample ranges which are shown in the last

two columns $($Mean and Range$),$ as well as x$-$bar$-$bar and R$-$bar values, which are shown below the table.

Edith knows the next step is to determine the "constants" in the table and comes up with: $A_2=0\mathrm{.}22,$

$D_3=0\mathrm{.}35,$ and $D_4=1\mathrm{.}65.$ You need to verify whether these values are correct. Are all three constants chosen

correctly? $($Yes or No$)$ yes

If the values are correct, please proceed to the next step. If the values are not correct, please write down

the correct values here:

Use the x $-$bar$-$bar and R$-$bar values computed by Edith, and appropriate "constants" to calculate the

center line and control limits for x $-$bar chart and R chart $($rounding to $3$ decimal places$).$

x$-$bar chart: CL $=\_99\mathrm{.}936$

UCL $=$

and $LCL=$

;

R chart: $CL=$

$21\mathrm{.}811$

$,$ UCL $=$

and $LCL=$