Comparison Between Systematic Error and Random Error

Systematic Error

Random Error

A replicable error that are consistently in same magnitude and direction.

Random in nature, magnitude and direction is unpredictable. It can be positive and negative.

Not easy to detect.

Easy to detect.

It can be assessed easily; statistical analysis not required.

Statistical analysis is required.

It cannot be eliminated by repeated measurement.

Can be eliminated by repeated measurement.

Characterization is not necessary.

Characterized by mean, standard deviation, and variance.

Routinely calibration of measuring instrument help to minimize the systematic error.

Calibration of measuring instruments does not affect random error.

Minimization of systematic error increase accuracy of measurement.

Minimization of random error increase repeatability.