Control Chart Drawing Assignment

The table below provides the number of alignment errors observed during the final inspection of

a certain model of airplane. Calculate the central, upper, and lower control limits for the c$-$chart

and draw the chart precisely on the graph sheet provided $($based on $3-$sigma limits$).$

Your chart should include a line for each of the control limits $($UCL$,$ CL$,$ and LCL$)$ and the

points for each observation. Number the x $-$axis $1$ through $25$ and evenly space the numbering for

the $y-$axis. Connect the points by drawing a line as well. Label each line drawn.