There have been complaints that the sports page of the Dubuque Register has lots of typos. The last 6 days have been examined carefully and the number of typos/page is recorded below. Is the process in control using
Day Number of Typos
Monday 2
Tuesday 1
Wednesday 5
Thursday 3
Friday 4
Saturday 0
What type of Statistical process Control Charts is appropriate in this case?
What is the expected value of the variable of interest (i.e., type of chart) in this situation?
Are all points within the control limits? Explain.
What are the 99.73% UCL and LCL for these data?
Would your previous answer change if the limits were set to 95.45%?