Data set

These include the number and types of the attributes or variables, and various statistical measures applicable to them, such as standard deviation and kurtosis.

[4] The values may be numbers, such as real numbers or integers, for example representing a person's height in centimeters, but may also be nominal data (i.e., not consisting of numerical values), for example representing a person's ethnicity.

In statistics, data sets usually come from actual observations obtained by sampling a statistical population, and each row corresponds to the observations on one element of that population.

Data sets may further be generated by algorithms for the purpose of testing certain kinds of software.

[5] Several classic data sets have been used extensively in the statistical literature: Loading datasets using Python:

Various plots of the multivariate data set Iris flower data set introduced by Ronald Fisher (1936). [ 1 ]