SSC
PHYSICS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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human error.
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the relationship of a measurement to an accepted standard.
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the limitations of the measuring instrument.
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the lack of instrument calibration.
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Detailed explanation-1: -Precision is a measure of statistical variability. It describes random errors which is caused by permanent, unpredictable fluctuations of measuring instrument. In other words, it basically describes closeness of the measured values.
Detailed explanation-2: -The precision of an instrument is the ability to repeat a series of measurements on the same piece and obtain the same results for each measured value. The variation in measured values can be expressed in terms of a standard deviation of the measuring error.
Detailed explanation-3: -Precision refers to the closeness of two or more measurements to each other. Using the example above, if you weigh a given substance five times, and get 3.2 kg each time, then your measurement is very precise. Precision is independent of accuracy.