statistics vs rectilinear regression

statistics and rectilinear regression both are nouns.

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

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