Joseph Lister and antiseptic surgery. Joseph Lister (18271912) demonstrated that postoperative mortality dropped from 16 fatalities in

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Joseph Lister and antiseptic surgery. Joseph Lister (1827–1912)

demonstrated that postoperative mortality dropped from 16 fatalities in 35 procedures to 6 fatalities in 40 procedures after adopting antiseptic surgical techniques. Determine the risks of postoperative mortality in each group. Then, test the proportions for inequality.

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