Systematic Error - errors resulting from measuring devices being out of calibration. Such measurements will be consistently too small or too large. These errors can be eliminated by pre-calibrating against a known, trusted standard.
Random Errors - errors resulting in the fluctuation of measurements of the same quantity about the average. The measurements are equally probable of being too large or too small. These errors generally result from the fineness of scale division of a measuring device.
Precision:Precision refers to the closeness of two or more measurements to each other
Accuracy: Accuracy is how close the actual value is to the true/theoretical value.
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