Five data entry operators work at the data processing department of the Georgia Bank. Each day for 10 days, the number of defective records in a sample of 200 records typed by these operators has been noted, as follows:

Sample	1	2	3	4	5	6	7	8	9	10
No. of Defectives	19	30	28	12	14	8	25	10	16	6

1. What SPC chart is needed here?
2. Using z=3, establish upper and lower control limits for the control chart and judge if the process is in control.