1 Demodex mites. 2  Scabies mites which live predominantly on animals, can also infect humans. 3  They don't normally complete their life cycle in humans, but can make for intensely itchy nights, for up to ten days. 4  Bird mites causing the sensation of crawling on the skin, especially at night.
The data set lists values for each of the variables, such as height and weight of an object, for each member of the data set. Each value is known as a datum. The data set may comprise data for one or more members, corresponding to the number of rows. The term data set may also be used more loosely, to refer to the data in a collection of closely related tables, corresponding to a particular experiment or event. An example of this type is the data sets collected by space agencies performing experiments with instruments aboard space probes.
1) In computer data processing, a record is a collection of data items arranged for processing by a program. Multiple records are contained in a file or data set. The organization of data in the record is usually prescribed by the programming language that defines the record's organization and/or by the application that processes it.