“Every physician knows the numerous sources of error which may lead an able advocate to wrong conclusions. The difficult art of statistics, which is no simple arrangement of numbers, but often requires very elaborate calculations, may lend itself to error; the neglect of some facts, or the undue prominence of others, the comparison of dissimilar conditions, or observations made on too short a scale or for too short a period—all these various conditions must be considered as sources of possible error.”

— Elizabeth Blackwell

p. 754 https://books.google.com/books?id=85o2AAAAMAAJ&pg=754
Medicine and Morality (1881)

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Elizabeth Blackwell 9

England-born American physician, abolitionist, women's righ… 1821–1910

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Elizabeth Blackwell 9

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