$****Show$ all work $to$ get a chance for partial credit.

Find the file "OPM ${101}_H$omework $4_D$ata" $on$ CANVAS. This file contains $20$ samples

collected from a $cosmetic$ manufacturing line. The data indicates the skin $sensitivity$ level $toa$

har color. The Excel file also has the $A_2,D_3,D_4,$ and $d_2$ table $on$ the second sheet. Please write

"see attachment" $in$ the answer space $if$ you $do$ graphics $in$ Excel file and you want $to$ attach $it$

$to$ your homework. Please try $to$ use Excel, otherwise you may have $todo$ a lot $of$ computation

$by$ hand.

$(a)$ Constrint $on{Y}_{h}or$ ahort far thic monifanturing lina.

$i.Is$ this process $"in$ control"? $ii.Do$ you notice any problems despite your answer $to$ Part $i?$

$(b)Coi.Is$ this process $"in$ control"? $ii.$ Based $on$ your calculation for the $X-$Bar Chart and $R-$Chart,

compare your answers regarding the $"in$ control" question? $Do$ the charts result differently? Why

$or$ Why Not?