math171 lab4 2-21-08 - from most spread to least is...

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1. I estimated by counting off at the same rate from each end of the graph. The distribution is skewed to the right. 2. 3. 4. a. The two groups would be Altos and Sopranos (mean height about 64), and Tenors and Basses (mean height about 69-70). If we were to use the median instead of the mean, the groupings would still be the same. b. The standard deviations and interquartile ranges provide the same gauge of relative spread among the four groups. By deviation, the ranking of the groups
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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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math171 lab4 2-21-08 - from most spread to least is...

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