The PMQ probes - University of Cape Town

Physics measurement questionnaire
Number:
Q 4.
(AN)
Another group of students have decided to calculate the average of all their measurements of d for
h = 400 mm. Their results after six releases are:
Release d (mm)
1 443
2 422
3 436
4 588
5 437
6 429
The students then discuss what to write down for the average of d .
All we need to do is
to add all our
measurements and then
divide by 6.
No. We should
ignore d = 588 mm
and then add the rest
and divide by 5.
A
B
With whom do you most closely agree? (Circle ONE):
A
B
Explain your choice.
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Physics Education Research Group, University of Cape Town, South Africa
and Science Education Group, University of York, UK