Terms to Know for Paper 1b
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6 Terms
1
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Accuracy
How close a measurement is to its true value
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Precision
How close measurements of the same item are to each other
3
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Random Error
Unpredictable variations that arise when repeat measurements are taken close to each other.
4
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Systematic Error
Consistent, predictable errors that affect the accuracy of measurements by pushing results consistently in one direction, either above or below the true value.
5
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Fundamental Unit
Basic units of measurement that serve as the foundation for all other units.
6
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Derived Unit
Units that are built from fundamental units.
Note 
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