Question

U-learn University uses a c-chart to monitor student complaints per week. Complaints have been recorded over the past ten weeks. Develop 3-sigma control limits using the following data: Week Number of Complaints (If the lower control limit is negative, round the LCL to zero and all other answers to 2 decimal places, e.g. 15.25.) UCL

Answer 1

Mena value of c (cbar )= 8/10 =0.8

CL=0.8

UCLc = cbar + 3*(cbar)^0.5 = 0.8+3* (0.8)^0.5 =3.483

LCLc =cbar - 3*(cbar)^0.5 = 0.8-3* (0.8)^0.5 =0

Answer 2

Mena value of c (cbar )= 8/10 =0.8

CL=0.8

UCLc = cbar + 3*(cbar)^0.5 = 0.8+3* (0.8)^0.5 =3.483

LCLc =cbar - 3*(cbar)^0.5 = 0.8-3* (0.8)^0.5 =0