Q.

In an experiment, the values of refractive indices of glass were found to be 1.54, 1.53, 1.44, 1.54, 1.56 and 1.45 in successive measurements i) mean value of refractive index of glass ii) mean absolute error iii) relative error and iv) percentage error are respectively,

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a

1.51,0.04,0.03,3%

b

1.51,0.4,0.03,3 %

c

15.1,0.04,0.03,3%

d

15.1,0.04,0.3,3 %

answer is A.

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Detailed Solution

μmean=∑μ6; Δμman=∑μmam−μi6 relative % error in μ=Δμmean μmean ×100
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In an experiment, the values of refractive indices of glass were found to be 1.54, 1.53, 1.44, 1.54, 1.56 and 1.45 in successive measurements i) mean value of refractive index of glass ii) mean absolute error iii) relative error and iv) percentage error are respectively,