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AQA Science: Glossary - Precision
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Precise measurements are ones in which there is very little spread about the mean value.
Precision depends only on the extent of random errors – it gives no indication of how close results are to the true value.
It is often the case that an instrument with smaller resolution (more sensitive measurement) will give more precise results.
| g (m/s²) | 10.25 | 10.23 | 10.32 | 10.28 | 10.22 |
The table above shows Paul’s results for the acceleration due to gravity, g.
- Find their mean and explain whether or not his results are precise.
- How can we check whether his results are accurate? Are they?
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