12.4 The data in Table EX 12.4 records the number of clinician electronic medical record (EMR) data entry errors in a long-term acute care facility collected as part of a sampling study. Samples of 500 data entries were used..

a) Determine the fraction defective in each sample.

b) Using a 95.5 percent confidence level, determine the control limits for an appropriate control chart.

c) Construct an appropriate control chart and identify any observations that are not within control limits.

Sample	Data Entry Errors
1	5
2	6
3	4
4	8
5	8
6	10
7	6
8	12
9	8
10	6
11	5
12	3
13	3
14	6
15	7
16	17
17	8
18	10
19	11
20	19
21	17
22	11
23	15
24	13