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Question

The period of oscillation of a simple pendulum in the experiment is recorded as 2.63 s, 2.56 s, 2.42, 2.71 s and 2.80 s respectively. Find the average absolute error.


A

0.12s

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B

0.11 s

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C

0.108 s

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D

none of these

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Solution

The correct option is D

none of these


ObservationxDifference(Differnce)22.630.010.00012.560.060.00362.420.200.04002.710.090.00812.800.180.0324Avg = 2.624Rounding off to 3 digitsAvg = 2.62

variance is average of|x|2=(x)25

Standard deviation=0.0168

= 0.129

Round off = 0.13

Average absolute error = ± 0.13 sec


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