expected value vs expectation

expected value and expectation both are nouns.

Word	Noun	Adjective	Verb	Adverb
expected value	Yes	No	No	No
expectation	Yes	No	No	No

As nouns, expected value and expectation are synonyms defined as:

expected value and expectation: the sum of the values of a random variable divided by the number of values

Other synonyms of expected value include arithmetic mean, first moment.

expected value (noun)	expectation (noun)
the sum of the values of a random variable divided by the number of values	belief about (or mental picture of) the future
	the sum of the values of a random variable divided by the number of values
	the feeling that something is about to happen
	anticipating with confidence of fulfillment