Multiple-choice: Choose the one best answer.
1.
In business, what must be the basis of decisions?
| A. profit potential |
| B. competition |
| C. data |
| D. stock market changes |
| E. customer demands |
2.
What is producer’s risk?
| A. type I error |
| B. type S error |
| C. type II error |
| D. strict liability |
| E. product liability |
3.
Consumer’s risk happens when statistical quality analysisfailsto result in what?
| A. the proper pricing of a product |
| B. the proper performance of a product |
| C. the proper cost structure for a product |
| D. the proper warranty for a product |
| E. the scrapping or reworking of a product |
4.
What two types of process variation commonly occur?
| A. proactive and reactive |
| B. subjective and objective |
| C. silent and loud |
| D. random and nonrandom |
| E. outward and inward |
5.
What type of variation is centered around a mean and occurs with a consistent amount of dispersion?
| A. nonrandom |
| B. consistent |
| C. systematic |
| D. deliberate |
| E. random |
6.
Random variation is referred to as what?
| A. uncontrollable variation |
| B. controlled variation |
| C. deliberate variation |
| D. consistent variation |
| E. systematic variation |
7.
Process stability means that we observe what type of variation in the process?
| A. virtual variation |
| B. arbitrary variation |
| C. random variation |
| D. casual variation |
| E. nonrandom variation |
8.
What do we use to determine process stability?
| A. stability charts |
| B. procedure charts |
| C. progression graphs |
| D. process charts |
| E. Ishakawa charts |
9.
To ensure that processes are stable, data are gathered in what?
| A. batches |
| B. populations |
| C. samples |
| D. lots |
| E. sets |
10.
Samples can be systematic according to what characteristics?
| A. impulse or chance |
| B. happenstance or sequence |
| C. coincidence or time |
| D. time or sequence |
| E. color or time |
11.
What term describes a continuous measurement such as weight, height, or volume?
| A. variable |
| B. attribute |
| C. nominally scaled variable |
| D. intervally scaled variable |
| E. ordinal |
12.
What theorem states that when we plot the sample means, the distribution approximates a normal distribution?
| A. central limit theorem |
| B. cause and effect theorem |
| C. intermediate value theorem |
| D. four color theorem |
| E. performance theorem |
Use the following information to answer questions 13 and 14.
A machine shop owner wishes to monitor the diameter of an engine-boring operation. He obtains 8 samples of 5 and records the following data:
| Sample # | |||||||
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
| 5.1 | 4.7 | 4.3 | 4.6 | 4.6 | 4.8 | 4.9 | 4.3 |
| 4.4 | 4.5 | 4.6 | 4.4 | 4.3 | 4.3 | 5.1 | 4.8 |
| 4.7 | 4.9 | 4.4 | 5 | 4.7 | 4.8 | 4.5 | 5 |
| 4.9 | 5.1 | 4.6 | 4.9 | 5 | 5 | 4.6 | 4.7 |
| 4.9 | 5.2 | 4.9 | 4.7 | 4.7 | 4.3 | 4.7 | 5.2 |
13.
What is the center line for a chart that monitors process dispersion?
| A. 0.50 |
| B. 0.55 |
| C. 0.60 |
| D. 0.69 |
| E. 0.80 |
14.
What should the lower and upper control limits be for anx-bar chart?
| A. (5.00, 8.00) |
| B. (–1.50, 1.50) |
| C. (4.33, 5.13) |
| D. (0.00, 1.45) |
| E. (–5.10, 5.10) |
15.
What term refers to the ability of a process to produce a product that meets specifications?
| A. procedure potential |
| B. method aptitude |
| C. content capability |
| D. process capability |
| E. method potential |
