sampling vs choice

sampling and choice both are nouns.

Word	Noun	Adjective	Verb	Adverb
sampling	Yes	No	No	No
choice	Yes	Yes	No	No

As nouns, choice is a hypernym of sampling; that is, choice is a word with a broader meaning than sampling:

Other hypernyms of sampling include option, pick, selection.

sampling (noun)	choice (noun)
(statistics) the selection of a suitable sample for study	the act of choosing or selecting
measurement at regular intervals of the amplitude of a varying waveform (in order to convert it to digital form)	the person or thing chosen or selected
items selected at random from a population and used to test hypotheses about the population	one of a number of things from which only one can be chosen

sampling (adjective)	choice (adjective)
	of superior grade
	appealing to refined taste