An SPC is carried out for a certain production process, extracting 20 samples of size 50 in which the number of elements that do not meet the quality requirements is examined, that is, that are defective Sample 1 2 3 4 5 6 7 8 9 10 Defectives 5 2 8 4 7 12 6 5 7 8 Sample 11 12 13 14 15 16 17 18 19 20 Defectives 4 6 4 3 5 7 8 3 6 4 a Develop a control chart using 3 sigma limits b Determine if the process is under control and Why c Draw the control chart

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Question: An SPC is carried out for a certain production process, extracting 20 samples of size 50 in which the number of elements that do not

An SPC is carried out for a certain production process, extracting 20 samples of size 50 in which the number of elements that do not meet the quality requirements is examined, that is, that are defective.

Sample	1	2	3	4	5	6	7	8	9	10
Defectives	5	2	8	4	7	12	6	5	7	8

Sample	11	12	13	14	15	16	17	18	19	20
Defectives	4	6	4	3	5	7	8	3	6	4

a. Develop a control chart using 3-sigma limits.

b. Determine if the process is under control and Why?

c. Draw the control chart.

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