Day 1	Day 2	Day 3
Sample	# of Defects	Sample	# of Defects	Sample	# of Defects
1	6	1	2	1	5
2	4	2	5	2	5
3	5	3	1	3	3
4	9	4	4	4	2
5	3	5	5	5	6
6	8	6	3	6	5
7	6	7	2	7	4
8	1	8	2	8	3
9	5	9	2	9	2
10	6	10	6	10	2
11	4	11	4	11	2
12	7	12	3	12	4
13	6	13	8	13	1
14	5	14	5	14	5
15	8	15	6	15	9
16	3	16	3	16	4
17	5	17	4	17	4
18	4	18	3	18	4
19	3	19	3	19	1
20	2	20	4	20	3

Develop a process control chart for Grass, Unlimited, to monitor the quality of its lawn service using 2-sigma limits.

USE EXCEL AND SHOW THE EXCEL FORMULAS