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Describe the accuracy of experimental data using error and percent error.
Describe the accuracy of experimental data using error and percent error.
Error in measurements: Observational / measurement / absolute
Error in measurements: Observational / measurement / absolute
Observational error (or measurement error) is the difference between a measured value of a quantity and its actual or true value.
Observational error (or measurement error) is the difference between a measured value of a quantity and its actual or true value.
Experimental value
Experimental value
The value you come up with from data taken during an experiment. In this case, the slope of your line graph.
The value you come up with from data taken during an experiment. In this case, the slope of your line graph.
Accepted / actual value
Accepted / actual value
The factual or generally accepted value for a relationship. In this case, there are 2.54 centimeters per every inch.
The factual or generally accepted value for a relationship. In this case, there are 2.54 centimeters per every inch.
Absolute error (or just error)
Absolute error (or just error)
Absolute error is the actual amount you were off, or mistaken by, when measuring something.
Absolute error is the actual amount you were off, or mistaken by, when measuring something.
Relative-percent error
Relative-percent error
Relative error compares the absolute error against the size of the thing you were measuring.
Relative error compares the absolute error against the size of the thing you were measuring.
Tolerance interval
Tolerance interval
A statistical interval (range of values) within which, with some confidence level, a specified proportion of a sampled data population falls.
A statistical interval (range of values) within which, with some confidence level, a specified proportion of a sampled data population falls.
Percent difference
Percent difference
Percent difference is used when comparing two independent measurements of the same quantity to find out how much the measurements differ from one another.
Percent difference is used when comparing two independent measurements of the same quantity to find out how much the measurements differ from one another.
Tyler DeWitt: Error and Percent Error
Tyler DeWitt: Error and Percent Error
How to calculate error and percent error.
How to calculate error and percent error.
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