Question $3(4$ points$)$:

Problem: Make a check sheet and Pareto chart for following car service repair shop data

$\backslash$table$[[$Ticket N$,$Work,Ticket No$,$Work,Tic,Work$],[1,$Tires,$11,$Brakes,$21,$Lube & Oil$],[2,$Lube &oil,$12,$Lube & O$,122,$Brakes$],[3,$Tires,$13,$Battery,$23,$Transmission$],[4,$Battery,$14,$Lube & O$,124,$Brakes$],[5,$Lube & oil,$15,$Lube & O$,125,$Lube & Oil$],[6,$Lube &oil,$16,$Tires,$26,$Battery$],[7,$Lube &oil $17,17,$Lube & O$,127,$Lube & Oil$],[8,$Brakes,$18,$Brakes,$28,$Battery$],[9,$Lube & Oil,,Tires,$29,$Brakes$],[10,$Tires,$20,$Brakes,$30,$Tires$]]$

Question $4(6$ points$)$:

Problem: Crimping the hoses at a manufacturing unit is intended to average $10$ minutes each. Five samples of four observations each have been taken. Use the sample data below in conjunction with table I to answer the following questions.

a$)$ construct upper and lower control limits for sample mean control chart.

b$)$ construct upper and lower control limits for sample range control chart.

c$)$ Do the results suggest that the process is in control?