statistician

n. expert in the field of statistics, one who specializes in the collection and interpretation of numerical data

Statisticians work with theoretical and applied statistics in both the private and public sectors. The core of that work is to measure, interpret, and describe the world and human activity patterns within it. It is common to combine statistical knowledge with expertise in other subjects. The applications are varied. Statisticians apply their knowledge to production, research, finances, medicine, insurance, and government. They often are employed to support managerial decisions or to supervise quality control in manufacturing.
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Noun
1. a mathematician who specializes in statistics
(synonym) mathematical statistician
(hypernym) mathematician
2. someone versed in the collection and interpretation of numerical data (especially someone who uses statistics to calculate insurance premiums)
(synonym) actuary
(hypernym) calculator, reckoner, figurer, estimator, computer
(hyponym) surveyor
(classification) statistics

(n.)
One versed in statistics; one who collects and classifies facts for statistics.
  

statist(ician)