# The tallest person ever confirmed by the Guinness records organization was Robert Wadlow of the United States, at 8 feet 11.1 inches tall. Heights of American men are approximately Normal with mean 69.3 inches and standard deviation 2.8 inches. Wadlow's z-score is 13.5 because (107.1 - ???)/2.8 =13.5

The tallest person ever confirmed by the Guinness records organization was Robert Wadlow of the United States, at 8 feet 11.1 inches tall. Heights of American men are approximately Normal with mean 69.3 inches and standard deviation 2.8 inches. Wadlow's z-score is 13.5 because $\left(107.1-???\right)/2.8=13.5$
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Caylee Davenport
Given data,
Robert Wadlow \times score= 8 feet 11.1 inch

z-score=13.5
$\therefore$ Wadlow z-score is 13.5 because $\left(\frac{107.1-69.3}{2.8}\right)=13.5$