The ages of the winners of a cycling tournament are approximately? bell-shaped. The mean age is 27.3 ?years, with a standard deviation of 3.6 years. The winner in one recent year was 30 years old.
?(a) Transform the age to a? z-score.
?(b) Interpret the results.
?(c) Determine whether the age is unusual.
?(a) Transform the age to a? z-score.
z equals
z=
?(b) Interpret the results.
An age of 30 is about ____ standard? deviation(s) (above or below) the mean?