With big data, the units of sampling and analyses are vastly dissimilar (e.g., the unit of sampling is at the individual level, while the unit of analysis can be at the country level).
Times are expressed in UT of the respective days and in units of sample (1 sample = 3 s).
The units of sampling are, obviously, the various groups.
Households were the units of sampling rather than individuals.
Then within each geographical location proportional to the number of centers the units of sampling were identified.
The filters were weighed and stabilized before and after sampling (45% humidity) for the determination of particulate concentration, expressed in μg/m units of sampled air [ 16– 16].
A base weight denotes the probability of selecting a participant from the total number of the sampling units of each sampling stage.
The principle of sampling was representativeness, and the unit of sampling was the individual person.
In "small data" (Estrin 2014), even if the datasets are large, the unit of analysis is similarly scoped as the unit of sampling.
The plates having ≥30 to 300 colonies were used to calculate bacterial population numbers, expressed as colony-forming units per unit of sample.
