Contributed by: Assessment of Performance Unit
1985 Administration
Unit Name: Instruments
Unit Content: Physical Science
Unit Theme:
Unit Statistics:
Performance of students reading various measuring instruments
to within one scale of graduation of the instrument.
| Instrument |
Set Value |
Marked Divs |
Sub-divs |
Range of Tolerance |
% Students within that Range (n=753) |
% Students Not Responding |
| Measuring cylinder |
53 cm3 |
10 cm3 |
x1 |
52-54 |
35 |
1 |
| Forcemeter |
17 N |
10 N |
x2 |
16-18 |
65 |
4 |
| Lever arm balance |
119 g |
50 g |
x2 |
118-120 |
37 |
9 |
| Ruler |
68 mm |
1 cm |
1 mm |
67-69 |
61 |
0 |
| Thermometer |
48oC |
10oC |
x1 |
47-49 |
84 |
2 |
| Stopclock |
437 s |
5 s |
x1 |
436-438 |
58 |
4 |
| Ammeter |
0.27 A |
0.1 A |
x 0.02 |
0.26-0.28 |
11 |
9 |
| Voltmeter |
1.3 V |
1 V |
x 0.1 |
1.2-1.4 |
61 |
13 |
| Syringe |
0.72 cm3 |
0.1 cm3 |
x 0.01 |
0.71-0.73 |
39 |
19 |
Notes: None
|
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