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Unformatted text preview: from most spread to least is Tenor-Alto-Bass-Soprano, which is the same as the ranking based on interquartile ranges. Standard Deviation Interquartile Range Mean Median Soprano 1.87274 2.5 64.25 65 Alto 2.79465 3.75 64.8857 65 Tenor 3.21632 5 69.15 68.5 Bass 2.36141 3 70.7179 71 Median c. The four groups probably break up into these two pairs based on gender. Sopranos and Altos are usually female vocal parts, while Tenors and Basses are generally sung by males....
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