in an experiment, the focal length of concave mirror found to have values in successive measurements as 17.3cm, 17.7cm, 18.4cm, 18.3cm, 17.9cm, 18.0cm. Calculate the mean absolute error and percentage error. Also express result in proper way.
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Mean value of the focal lenght fmean = 17.3 + 17.8 + 18.3 + 18.2 + 17.9 + 18/6 = 17.9 Mean absolute error is Δ fmean = |17.9 - 17.3| + |17.9 - 17.8|
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