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In this graph, there are a number of flaws:
- The 3-D effects make it difficult to read the bars. Do you look at the
front of each bar, the side of each bar, or the back of each bar?
- The non-horizontal scale artifically increases the lower-income bars compared
to the upper-income bars.
- Some of the bars are missing the percentage figure?
- The interval sizes change. For example, it goes by by $10,000 than by $25,000
which artificially increases the 50-75,000 bar. As well why use 29,999 rather than 30,000?
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Copyright 2008: Carl J. Schwarz cschwarz@stat.sfu.ca