Free CSSBB Exam Braindumps

- (Topic 1)
= 0.05 A sample of size 50 from machine A has a mean of 18.2 and standard deviation 3.1. A sample of size 40 from machine B has mean 17.6 and standard deviation 2.8. Do these data indicate that the population for machine A has a larger mean? Assume the populations are normal.

1. A. yes
2. B. no

Correct Answer: B

- (Topic 1)

This experimental design is an example of:

1. A. full factorial
2. B. half fractional factorial
3. C. fractional factorial
4. D. ANOVA design

Correct Answer: A

- (Topic 1)
A project that lacks a clear definition of its scope and boundaries runs the risk of:

1. A. straying from the intended path
2. B. trying to solve unrelated problems
3. C. having difficulty in collecting baseline data
4. D. suffering morale problems
5. E. all the above
6. F. none of the above

Correct Answer: E

- (Topic 1)
The principle disadvantage of fractional factorial experiments is that:

1. A. experimental error is high
2. B. robustness is compromised
3. C. effects are confounded
4. D. measurements are less precise
5. E. analysis is more difficult

Correct Answer: C

- (Topic 2)
Calculate the main effect of factor A:

1. A. 20
2. B. 25
3. C. 30
4. D. 40
5. E. none of the above

Correct Answer: A

A factorial experiment can be analyzed using ANOVA or regression analysis[ citation needed]. It is relatively easy to estimate the main effect for a factor. To compute the main effect of a factor "A", subtract the average response of all experimental runs for which A was at its low (or first) level from the average response of all experimental runs for which A was at its high (or second) level.