ERRORS AND ACCURACY

 ERRORS AND ACCURACY

            

In an experiment certain errors may rise due to experimenter, or to the instrument used or due to both. We divide these errors into three categories, namely, personal error, systematic error and random error.

PERSONAL ERROR

                This error due to the tendency of person who takes reading in favors of a particular reading. Such procedure produces errors in taking observations this type of errors can be removed by avoiding this bias.

SYSTEMATIC OR INSTRUMENTAL ERROR

                This type of error arises due to the fault in the measuring instruments. This is called the zero error of the instruments. This error can be overcome by adopting the relevant zero error correction.

RANDOM ERROR

                This type of error may arise due to external condition which are at certain time beyond the control of the experimenter. This error can be minimized by maintaining certain conditions in the laboratory. For example, changes in temperature