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Explain the following terms with respect to precise measurement : i. Absolute deviation ii. Mean absolute deviation iii. Relative deviation |
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Answer» i. Absolute deviation : An absolute deviation is the modulus of the difference between an observed value and the arithmetic mean for the set of several measurements made in the same way. It is a measure of absolute error in the repeated observation. It is expressed as follows : Absolute deviation = |Observed value – Mean| ii. Mean absolute deviation : Arithmetic mean of all the absolute deviations is called the mean absolute deviation in the measurements iii. Relative deviation : The ratio of mean absolute deviation to its arithmetic mean is called relative deviation. It is expressed as follows : Relative deviation = \(\frac{Mean\,absolute\,deviation}{Mean}\) x 100% |
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