medium · LSAT Logical Reasoning

Analyst: The recent increase in the average household income in our province suggests that most of our citizens are enjoying a higher standard of living than they were five years ago.

Which of the following, if true, most seriously undermines the analyst's conclusion?

  1. The entire rise in average income traces to an enormous jump in earnings concentrated among the wealthiest one percent of households.
  2. The price of imported luxury goods has held perfectly steady throughout the same five-year stretch in every district of the province.
  3. Many citizens cannot say with any precision how much their own household income has actually changed over the past five-year period.
  4. Average household size across the province has fallen markedly over the past decade, even in its most populous urban centers.
  5. Average household income in each of the neighboring provinces rose by a roughly comparable amount over the same five-year span.

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