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A process that is considered to be in control measures an ingredient in ounces. Below are the last 10 samples (each size) taken?





SAMPLES






1

2

3

4

5

6

7

8

9

10

10

9

13

10

12

10

10

13

8

10

9

9

9

10

10

10

11

10

8

12

10

11

10

11

9

8

10

8

12

9

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11

10

10

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12

8

10

12

8

12

10

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10

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8

9

12

a) What is the process standard deviation? What is

b) If, what are the control limits for the mean chart

c) What are the control limits for the range chart?

d) Is the process in control?

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