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a. Each of the data sets is roughly symmetric, so the mean or median could be used to compare the centers of the data sets. The mean will be used here. The mean height of the sopranos is 64.5 inches, the mean height of the altos is 65.2 inches, the mean height of the tenors is 69.6 inches, and the mean height of the basses is 70.2 inches. ................
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