Assignment:
Problem:
A restaurant wishes to monitor their service quality Each day. 20 customers were asked if they enjoyed the diner. The number responding "no" was tracked for 10 days as follows:
Day 1 2 3 4 5 6 7 8 9 10
#of No's 3 0 2 6 2 3 0 2 1 4
A. Construct control limits (UCL and LCT) with n (alpha) risk of 2% for this service.
B. Based on the control limits obtained above, is there any non-random cause of variation? Why?