Pick up the correct statement from the following :

Question:
Pick up the correct statement from the following :

1.the apparent error on reversal is twice the actual error

2. the correction may be made equal to half the observed discrepancy.

3.the good results may be obtained from a defective instrument by reversing and taking the mean of two erroneous results

4.all the above.

Posted Date:-2021-03-26 00:51:12


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