Sample r 1 341 4 2 320 3 3 318 4 4 334 5 5 350 4 6 321 2 7 3

Sample

r

1

34.1

4

2

32.0

3

3

31.8

4

4

33.4

5

5

35.0

4

6

32.1

2

7

32.6

7

8

33.8

9

9

34.8

10

10

38.6

4

11

35.4

8

12

34.0

6

13

36.0

4

14

37.2

7

15

35.2

3

16

33.4

10

17

35.0

4

18

34.4

7

19

33.9

8

20

34.0

4

R Control Limits

Sample		r
1	34.1	4
2	32.0	3
3	31.8	4
4	33.4	5
5	35.0	4
6	32.1	2
7	32.6	7
8	33.8	9
9	34.8	10
10	38.6	4
11	35.4	8
12	34.0	6
13	36.0	4
14	37.2	7
15	35.2	3
16	33.4	10
17	35.0	4
18	34.4	7
19	33.9	8
20	34.0	4

Solution