We found one dictionary that defines the word mathematical statisticians:

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1. mathematical statisticians: Vocabulary.com

(Note: See mathematical_statistician as well.)

Definitions from WordNet (mathematical statistician) ▸ noun:  a mathematician who specializes in statistics ▸ Also see mathematical_statistician ▸ Words similar to mathematical statisticians ▸ Usage examples for mathematical statisticians ▸ Idioms related to mathematical statisticians ▸ Wikipedia articles (New!) ▸ Words that often appear near mathematical statisticians ▸ Rhymes of mathematical statisticians ▸ Invented words related to mathematical statisticians