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== History ==
The range-bar method was first introduced by [[Mary Eleanor Spear]] in her book "Charting Statistics" in 1952<ref>{{Cite book|title=Charting Statistics|last=Spear|first=Mary Eleanor|publisher=McGraw Hill|year=
|pages=166}}</ref> and again in her book "Practical Charting Techniques" in 1969.<ref>{{Cite book|title=Practical charting techniques|last=Spear, Mary Eleanor.|date=1969|publisher=McGraw-Hill|isbn=0070600104|___location=New York|oclc=924909765}}</ref> The box-and-whisker plot was first introduced in 1970 by [[John Tukey]], who later published on the subject in his book "Exploratory Data Analysis" in 1977.<ref name=":0">{{cite web |first1=Hadley |last1=Wickham |first2=Lisa |last2=Stryjewski |url=https://vita.had.co.nz/papers/boxplots.pdf |title=40 years of boxplots |access-date=December 24, 2020}}</ref> ==Elements==
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