Page 8 - 6686

errors of the fourth group are subjective. Objective errors can
occur on an arbitrary stage of measurement transformations, while
subjective only when experimenter obtains the values of quantities.
Depending on regularity of appearance, errors are divided
into systematic, random and rough.
Systematic error called component of measurement error
that remains constant or varies naturally when measurements of
the same quantity are repeated.
Random error is part of error, which varies randomly when
measurements of the same quantity are repeated.
Rude error is measurement error, which is significantly
higher than the expected, under given conditions of measurement
of error.
The less systematic and random errors are, the higher is
accuracy of measurment. That’s why measurement accuracy is a
characteristic of quality and displays proximity of measurement
results to the true value of measured quantity.
Characteristic of the quality of measurement, which reflects
proximity of systematic error to zero, is correctness of
measurement. If systematic error is known, then the result can be
corrected by the introduction of amendment.
Correction is the value of absolute error with the opposite
sign. It is added to the measurement result to remove systematic
error [2].
Systematic errors
Systematic errors can be constant and variable. Variable
systematic errors are divided into progressive, periodical and
those, changing by complex law.
Progressive called such systematic errors that constantly
grow or decrease.
Periodical are considered systematic error, sign and values
of which are periodically changed.
8