Item MO026003: An engineer could use a model of a machine to show someone else what the machine is like, or to help him/herself think about how the machine works.
Which of the following statements describes why an engineer might use a model of a machine?
- 
    To show someone else what the machine is like,
 or to help himself think about how the machine works
- 
    To show someone else what the machine is like,
 but not to help himself think about how the machine works
- 
    To help him think about how the machine works,
 but not to show someone else what the machine is like
- 
    Neither to show someone else what the machine is
    like
 nor to help think about how the machine works
| Answer Choice | Overall | Grades | Gender | Primary Language | |||
|---|---|---|---|---|---|---|---|
| n = 1574 | 6–8 n = 988 | 9–12 n = 578 | Male n = 752 | Female n = 789 | English n = 1437 | Other n = 94 | |
| A. | 71% | 68% | 75% | 67% | 75% | 72% | 61% | 
| B. | 11% | 12% | 10% | 13% | 9% | 10% | 22% | 
| C. | 12% | 14% | 9% | 14% | 11% | 12% | 12% | 
| D. | 6% | 6% | 6% | 6% | 5% | 6% | 5% | 

