- (Topic 2)
The null hypothsis should be:

1. A. rejected
2. B. not rejected
3. C. accepted

Correct Answer: A

- (Topic 1)
The following data were collected on the diameters of turned shafts: 2.506 2.508 2.505 2.505. These values are: I. Attribute data II. Discrete data III. Variables data IV. Continuous data

1. A. I and II A stable, normally distributed process with specification 3.50 .03 has = = .016. What percent of the production violates specification?
2. B. I only
3. C. II only
4. D. I and IV
5. E. III and IV

Correct Answer: E

- (Topic 2)
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.A customer requires that SPC charts be done on their forms which have spaces for only 5 readings per sample. In preparation for calculating the new control limits the following question is asked, “Will the new average range be larger or smaller than the current average range?”. The answer is:

1. A. yes
2. B. no
3. C. maybe
4. D. smaller
5. E. larger
6. F. same size
7. G. none of the above

Correct Answer: D

- (Topic 1)
If the probability that event A occurs is 0.51, the probability that event B occurs is 0.64 and that probability that both A and B occur is 0.23 then:

1. A. events A and B are complementary
2. B. events A and B are mutually exclusive
3. C. events A and B are supplementary
4. D. events A and B are not mutually exclusive
5. E. events A and B are statistically independent

Correct Answer: D

- (Topic 1)
The Toronto plant produces appliances in the following distribution: Type A 23% Type B 42% Type C 35% A random sample of 300 appliances from the Texas plant has the following distribution: Type A 73 Type B 111 Type C 116 Is the distribution of appliances at the Texas plant the same as that at the Toronto plant?

1. A. yes
2. B. no

Correct Answer: B