Data for	p - chart
(n = 20 )		Number of defectives
Sample #		Measurements		p
1		5.0		0.25
2		3.0		0.15
3		5.0		0.25
4		1.0		0.05
5		0.0		0.00
6		0.0		0.00
7		3.0		0.15
8		6.0		0.30
9		2.0		0.10
10		3.0		0.15
11		4.0		0.20
12		1.0		0.05
13		2.0		0.10
14		2.0		0.10
15		5.0		0.25
Totals		42.0		2.10
				0.14

how do you find the upper and lower limit