medium · LSAT Logical Reasoning
Over the last five years, the average household income in Greenville has risen. A columnist concludes from this that most families in Greenville are now better off financially than they were before.
The columnist's reasoning is questionable because it:
- takes no account of the financial circumstances of families that have recently moved into Greenville from elsewhere
- overlooks that household income is far from the only meaningful measure of a family's overall financial well-being
- assumes that the recent upward trend in Greenville incomes will continue to persist in the years that lie ahead
- fails to recognize that a small number of very high earners can raise an average even if most families gain nothing
- treats Greenville's recent income experience as though it were typical of every other town across the surrounding region
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