QUESTION $4$

Refer to the attached Excel file $"$HW Control Charts" using the $"$X$-$Chart" tab data; the UCL and LCL of those samples are:

$$ UCL:$7\mathrm{.}11,$ LCL:$6\mathrm{.}05$

UCL: $6\mathrm{.}11,$ LCL: $6\mathrm{.}05$

UCL:$6\mathrm{.}11,$ LCL:$7\mathrm{.}05$

UCL:$6\mathrm{.}11,$ LCL:$5\mathrm{.}05$

UCL:$5\mathrm{.}11,$ LCL:$6\mathrm{.}05$

$\backslash$table$[[1,$Sample,# of Defects$],[2,1,6],[3,2,5],[4,3,7],[5,4,8],[6,5,4],[7,6,5],[8,7,7],[9,8,4],[10,9,5],[11,10,4],[12,11,6],[13,12,7],[14,13,5],[15,14,7],[16,15,5],[17,16,4],[18,,],[19,,]]$