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8 Cards in this Set
- Front
- Back
- 3rd side (hint)
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Reliability means |
Confidence about your results, depending on how far your results are spread around the mean (which can be displayed by standard deviation error bars). |
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To improve reliability |
Repeat the test at least three times. Discard and repeat anomalies. |
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Accuracy means |
How close your results are to the true value. |
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To improve accuracy |
Standardise the procedure carefully for each value. Increase the number of values. Increase precision of the equipment used to measure the independent variable (e.g. temperature). |
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Precision means |
Ability to be exact. |
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To improve precision |
Increase precision of the equipmet used to measure the dependent variable (your results). E.g. increase the number of graduations on the recording instrument (e.g. 0.1g to 0.01g) |
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Validity means |
Valid data is not affected by anything other than the independent variable. |
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To improve validity |
Ensure data is only affected by the independent variable. |
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