Question

Choose from the following the correct option:

a. Error is minimized by taking the arithmetic mean of a large number of samples.
b. Source of random error is known and hence it can be corrected.
c. Source of random error is not known, and analysis is done by statistical methods.
d. Zero error of an apparatus can be corrected completely.

Answer 1

The correct option is c. Source of random error is not known, and analysis is done by statistical methods.

Step-by-step explanation:

The correct option is c. Source of random error is not known, and analysis is done by statistical methods.

Random errors are the statistical variability of the measured number, and they vary from one observation to another. Taking the arithmetic mean of a large number of samples can minimize random errors, but it cannot completely eliminate them.

On the other hand, systematic errors are constant and have the same value in every measurement. These errors usually occur due to inaccurate calibration of the measuring instrument. Therefore, zero error of an apparatus cannot be corrected completely