A randomly selected sample of 100 insurance claim forms filed are inspected each day over 12 working days and the number of forms with errors have been recorded in the following table.
Sample Number Defective
1 3
2 2
3 0
4 1
5 7
6 2
7 0
8 1
9 0
10 3
11 2
12 1
Construct the appropriate control chart(s) for these data. Determine if the process is in control. Explain your answers.