Representativity is often a misspelling of representativeness.Representativity
has no English definition.
As a noun representativeness
is the state or quality of being accurately representative of something.
Other Comparisons: What's the difference?
The state or quality of being accurately representative of something.
*2001 , Sydney I. Landau, Dictionaries: The Art and Craft of Lexicography , Cambridge University Press (ISBN 0-521-78512-X), page 331,
*:One should not compromise on the essential standard of representativeness of the corpus as a whole. A corpus is only good if it can be reasonably trusted to represent the way language is used by those people whose usage one is interested in describing.
Not English Representativity has no English definition. It may be misspelled.