mean vs expectation

expectation vs mean

mean and expectation both are nouns.

mean is an adjective but expectation is not an adjective.

mean is a verb but expectation is not a verb.

Word	Noun	Adjective	Verb	Adverb
mean	Yes	Yes	Yes	No
expectation	Yes	No	No	No

As nouns, expectation is a hyponym of mean; that is, expectation is a word with a more specific, narrower meaning than mean:

mean: an average of n numbers computed by adding some function of the numbers and dividing by some function of n
expectation: the sum of the values of a random variable divided by the number of values

Other hyponyms of mean include arithmetic mean, expected value, first moment, geometric mean, harmonic mean, Winsorized mean, weighted arithmetic mean, weighted average, weighted mean.

mean (noun)	expectation (noun)
an average of n numbers computed by adding some function of the numbers and dividing by some function of n	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

mean (adjective)	expectation (adjective)
of no value or worth
having or showing an ignoble lack of honor or morality
characterized by malice
approximating the statistical norm or average or expected value
marked by poverty befitting a beggar
(used of sums of money) so small in amount as to deserve contempt
(used of persons or behavior) characterized by or indicative of lack of generosity
very good; of the highest quality

mean (verb)	expectation (verb)
have in mind as a purpose
intend to refer to
destine or designate for a certain purpose
mean or intend to express or convey
denote or connote
have as a logical consequence
have a specified degree of importance

Difference between mean and expectation

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