Since 2000, the median wage in the United States has risen by 1%, while the median wage for every educational subgroup (high school dropouts, high school graduates, college graduates, and people with advanced degrees) has decreased. This apparent contradiction is an example of:
A)extrapolation.
B)Simpson's paradox.
C)causation.
D)correlation.

Question

Quizplus · Accepted Answer

Simpson's paradox refers to a phenomenon where a trend or relationship observed in different groups of data disappears or reverses when the groups are combined. In this case, the apparent contradiction of median wages decreasing for all educational subgroups while the overall median wage has risen is an example of Simpson's paradox. This could happen because the proportion of people in each educational subgroup has changed over time, and the subgroups have different starting salaries and changing proportions.

Since 2000, the Median Wage in the United States Has