This important historical figure:
a) … coined the term “standard deviation”;
b) … had his book, “The Grammar of Science,” selected by 23-year-old Albert Einstein as the first item to be studied in Einstein’s elite “book club”;
c) … co-founded (1885) the “Men & Women’s Club” to discuss gender equality;
d) … has his main stats creation summarized by his last name’s middle letter.
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