Violent crimes include murder, forcible rape, robbery, and aggravated assault. The following data represent the violent-crime rate (crimes per 100,000 population) by state plus the District of Columbia in 2009.

(a) If thirteen classes are to be formed, choose an appropriate lower class limit for the first class and a class width.
(b) Construct a frequency distribution.
(c) Construct a relative frequency distribution.
(d) Construct a frequency histogram of the data.
(e) Construct a relative frequency histogram of the data.
(f ) Describe the shape of the distribution.

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449.8 1345.9 400.1 281.3 384.7 670.8 296.5 633.0 612.5 258.7 491.8 404.3 185.6 257.0 408.3 426.1 620.0 253.6 200.7 667.7 228.2 517.7 274.8 119.8 281.6 332.1 490.9 472.0 228.4 589.9 702.2 501.1 212.7 337.8 497.2 457.1 159.6 254.7 131.4 298.7 333.2 497.0 311.5 380.5 226.8 636.6 279.2 243.9 619.0 252.6 331.0