This experimental design is an example of:

• A.half fractional factorial
• B.ANOVA design
• C.full factorial
• D.fractional factorial

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A set of data from a process has 8 readings per sample and 50 samples. The mean of the 50 sample means is 12.62. The mean of the 50 ranges is 0.18.Find control limits for the R chart.

• A.0.10 and 0.25
• B.none and 0.33
• C.0.02 and 0.33
• D.none of the above

Correct Answer: C

The formula required to calculate control limits for the R chart are as follows:

= 1.864 x 0.18 = 0.33

= 0.1111 x 0.18 = 0.02

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Situations where standardized work needs to be incorporated include all of these except
_____________________.

• A.Machines continually operating to reduce the labor cost per piece
• B.Lack of a system to assure proper inventory levels at repair stations
• C.Changeover instructions incomplete
• D.Process flow for the same product assembly taking various cycle time for completion

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The following stem-and-leaf plot was developed from sample data.

What is the median value for this sample?

• A.48.0
• B.51.0
• C.51.6
• D.53.5

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To be an effective Lean Six Sigma practitioner one must understand the difference between
___________________________.

• A.ANOVA and the Analysis of Variance
• B.Nonparametric tests and tests of Non-normal Data
• C.F-test and test of variances of 2 samples
• D.Practical and Statistical significance

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