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A National Vital Statistics Report (www.cdc.gov/nchs/) indicated that nearly 300,000 black Americans died in 2003 compared with just over 2 million white Americans. Here are histograms displaying the distributions of their ages at death.

329_Fig 005.jpg

a) Describe the overall shapes of these distributions.

b) How do the distributions differ?

c) Look carefully at the bar definitions. Where do these plots violate the rules for statistical graphs?

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