Question: 10 The following table gives the average width in millimetres for each of 20 samples of five panels used in the manufacture of a domestic

10 The following table gives the average width in millimetres for each of 20 samples of five panels used in the manufacture of a domestic appliance. The range of each sample is also given.

Sample Mean Range Sample Mean Range number number 1 550.8 4.2 11 553.1 3.8 2 552.7 4.2 12 551.7 3.1 3 553.8 6.7 13 561.2 3.5 4 555.8 4.7 14 554.2 3.4 5 553.8 3.2 15 552.3 5.8 6 547.5 5.8 16 552.9 1.6 7 550.9 0.7 17 562.9 2.7 8 552.0 5.9 18 559.4 5.4 9 553.7 9.5 19 555.8 1.7 10 557.3 1.9 20 547.6 6.7 Calculate the control chart limits for the Shewhart charts and plot the values on the charts. Interpret the results. Given a specification of 540 5 mm, comment on the capability of the process.
(See also Chapter 9, Discussion question 4, and Chapter 10, Discussion question 6)

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