Question: Consider the following data table, Subgroups Quality characteristic 1 11.5 11 10.5 10.5 2 9.8 10.8 10.8 10.6 3 10 11 11.5 10 4 9.5

Consider the following data table,

Subgroups

Quality characteristic

1

11.5

11

10.5

10.5

2

9.8

10.8

10.8

10.6

3

10

11

11.5

10

4

9.5

9.2

10

10.4

5

9.5

8.3

9.5

9.8

6

9

9.1

9.6

9.7

7

9.1

9.5

10.4

9.8

a) Design Xbar and R control charts.

b) Determine, whether the process is in control or not.

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