CSSBB Free Practice Test

- (Topic 2)
A newspaper article describes a high positive correlation between obesity and orange juice consumption among six-year-olds. Parents who restrict the use of orange juice for their children have:

1. A. made a type I error
2. B. made a type II error
3. C. misunderstood margin of error
4. D. confused correlation with causation

Correct Answer: D

- (Topic 2)
A normal probability plot is used to:

1. A. determine whether the distribution is normal
2. B. plot z values
3. C. determine process capability
4. D. find percent out of specification

Correct Answer: A

- (Topic 1)
Is it safe to assume that the interaction effects are negligible?

1. A. yes
2. B. no
3. C. probably

Correct Answer: C

- (Topic 2)
This QFD matrix was used in the design process for a ball point pen. What symbol is
appropriate for the square labeled 7?

A.
B.
C.

1. A. none of the above

Correct Answer: B

- (Topic 1)
(Refer to the previous problem) To estimate the within treatment variance the experimenters would calculate the variances of:

1. A. all 80 readings
2. B. the five replications for each run
3. C. the runs for which a factor is at its lowest level

Correct Answer: B