Question: A quality analyst wants to construct a control chart for determining whether three machines, all producing the same product, are in control with regard to
A quality analyst wants to construct a control chart for determining whether three machines, all producing the same product, are in control with regard to a particular quality variable. Accordingly, he sampled four units of output from each machine, with the following results:
| Machine | Measurements | |||
| #1 | 17 | 15 | 15 | 17 |
| #2 | 16 | 25 | 18 | 25 |
| #3 | 23 | 24 | 23 | 22 |
26 What is the estimate of the mean of the sampling distribution for the sample mean?
Multiple Choice
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16
-
19
-
20
-
21
-
23
27 What is the estimate of the sample average range based upon this limited sample?
Multiple Choice
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13.0
-
4.33
-
5.4
-
4.2
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2.0
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