FlorenceNightingale - inventor of the Pie Chart, and the use of statistics. Also a nurse or something.
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Not quite the ''inventor''. See this link for details
http://www.math.yorku.ca/SCS/Gallery/historical.html
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She actually used [''and invented?''] a type of pie-chart known as a coxcomb:

http://www.math.yorku.ca/SCS/Gallery/images/coxcomb.gif