middle fifty vs statistic

middle fifty and statistic both are nouns.

Word	Noun	Adjective	Verb	Adverb
middle fifty	Yes	No	No	No
statistic	Yes	No	No	No

As nouns, statistic is a hypernym of middle fifty; that is, statistic is a word with a broader meaning than middle fifty:

middle fifty: a measure of statistical dispersion, being equal to the difference between the upper and lower quartiles.
statistic: a datum that can be represented numerically

middle fifty (noun)	statistic (noun)
a measure of statistical dispersion, being equal to the difference between the upper and lower quartiles.	a datum that can be represented numerically