Question: Quality: How long does it take for super glue to dry up? A manufacturing quality manager took the following five samples, each sample includes four

  1. Quality: How long does it take for super glue to dry up? A manufacturing quality manager took the following five samples, each sample includes four observations of dry-up times in minutes (n=4). Using overall standard deviation Sigma= .02 and using the three sigma standard deviation formula, calculate overall mean. Provide an X and an R chart. Comment on this process variation.

Sample -

observations

1

2

3

4

5

1

12.11

12.15

12.09

12.12

12.09

2

12.1

12.12

12.09

12.1

12.14

3

12.11

12.1

12.11

12.08

12.13

4

12.08

12.11

12.15

12.1

12.12

Overall mean

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