IB Physics SL S2.2.3 Data Quality Questions
Assess SL data quality by identifying systematic error, estimating gradient uncertainty and explaining why repeated measurements improve precision.
- Syllabus
- First assessment 2025
- Course
- Physics SL
- Level
- SL
Exam points
- Identify systematic and random errors from data patterns, error bars and departures from expected relationships.
- Improve reliability and precision by repeating measurements, averaging appropriately and reducing percentage uncertainty.
- Use uncertainty information and trend-line fit to judge data quality and the strength of experimental conclusions.
IB Physics SL S2.2.3 Data Quality Questions question 1
[Maximum number: 1]
A student is running an experiment to determine the acceleration of free-fall g. She drops a small metal ball from a given height and measures the time t taken for it to fall using an electronic timer. She repeats the same experiment several times.
Suggest a reason for repeating the experiment in the same conditions.
«to reduce» random errors
to reduce absolute uncertainty
to improve precision
OWTTE
Marking guidance:
Do not accept just "to find an average" or just "reduce error" Ignore any mention to accuracy
1 max
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