Sampling in which the sample locations are selected randomly from the whole population.
Note: The population defines the kind of quantity of the location. For example, in a time series, the quantity giving the location is time, in QSAR the location is a point in design space.
Source:
PAC, 2016, 88, 407. 'Vocabulary of concepts and terms in chemometrics (IUPAC Recommendations 2016)' on page 411 (https://doi.org/10.1515/pac-2015-0605)