A production manager at a Contour Manufacturing plant has inspected the number o

Question

A production manager at a Contour Manufacturing plant has inspected the number of defective plastic molds in five random samples of 30 observations each. Following are the number of defective molds found in each sample:

Sample

Number of Defects

Number of Observations in Sample

1

2

30

2

0

30

3

1

30

4

0

30

5

2

30

Total

5

150

find
(Round your answers to 2 decimal places, the tolerance is +/-0.01)

CL =
UCL =
LCL

Sample

Number of Defects

Number of Observations in Sample

1

2

30

2

0

30

3

1

30

4

0

30

5

2

30

Total

5

150

Explanation / Answer

For P control chart

Where n is sample size = 5

UCL = pbar + 3*sqrt{pbar(1-pbar)/n} =0.1316

LCL = pbar - 3*sqrt{pbar(1-pbar)/n} = 0 since LCL cant be negative

CL =pbar.=0.0333

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