You searched for: “random errors
random error (s) (noun), random errors (pl)
Indefiniteness or a mistake in a measurement process that varies unsystematically or unpredictably from measurement to measurement: The random error has a magnitude that may be quantifiable by statistical methods.

Random errors are caused by unexpected fluctuations in the readings of a measuring apparatus or by the reader of the instrument.

This entry is located in the following unit: err-, errat- (page 2)