Find the centerline and find the control limits

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Reference no: EM13537596

Question 1: A manufacturer of wood screws periodically examines screws heads for the presence or absence of burrs. Subgroups of 300 screws are selected and examined using a carefully designed procedure. The collected data is as follows:

Observation

Number of Screws with Burrs

1

19

2

16

3

11

4

6

5

22

6

2

7

4

8

7

9

5

10

27

11

7

12

13

13

17

14

29

15

1

16

2

17

19

18

28

19

24

20

23

a- Find the centerline (show your calculations)

b- Find the control limits (show your calculations)

c- Use MINITAB to develop the appropriate control chart

d- Are there any special causes of variation? Which observations?

e- What to do next?

Reference no: EM13537596

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