rectilinear regression vs statistics

rectilinear regression and statistics both are nouns.

Word	Noun	Adjective	Verb	Adverb
rectilinear regression	Yes	No	No	No
statistics	Yes	No	No	No

rectilinear regression (noun)	statistics (noun)
the relation between variables when the regression equation is linear: e.g., y = ax + b	a branch of applied mathematics concerned with the collection and interpretation of quantitative data and the use of probability theory to estimate population parameters