Bunuel
Male CEOs of major corporations are, on average, three inches taller than the average male. When data from the general population are analyzed and corrected for gender and age, a clear pattern emerges: for every extra inch of height, a person's annual salary increases by approximately $ 789. Citing these data, a prominent journalist claims that most employers have an unconscious bias in favor of tall people.
Which of the following considerations, if true, would most seriously undermine the journalist's argument?
(A) On average, a woman is shorter than her husband and earns less than he does.
(B) Socioeconomic status has been shown to have a strong positive correlation to both height and educational attainment.
(C) Professional basketball players, who are some of the tallest people in the labor force, have high incomes.
(D) Human resources professionals, who make many hiring decisions, are on average no taller than the general population.
(E) A tall person's tenure in a paid position is typically shorter than is the tenure of a person of average height.
Official ExplanationThe journalist cites data about the success of tall people, then concludes that employers have an unconscious bias in favor of tall people. The journalist assumes that employer bias is the only explanation for the data; the correct choice will question this explanation.
(A) Irrelevant. Gender comparisons are irrelevant to the journalist's data on CEOs, since those data are only about male CEOs. Likewise, gender comparisons are irrelevant in interpreting the journalist's data about the general population, since the passage says those data have been corrected for the influence of gender and age.
(B) CORRECT. If socioeconomic status is correlated to both height and educational attainment, you would expect taller people to be, on average, better educated. The economic success of tall people could then be attributed to their higher levels of educational attainment rather than to employer bias.
(C) Irrelevant. Professional basketball players, with their above average height and above average pay, only account for a small part of the correlation between height and pay. And insofar as height is useful in the game of basketball, the high wages of tall players can be explained without reference to any unconscious bias on the part of their employers.
(D) Irrelevant. An HR professional might unconsciously favor tall people (or good-looking people, or charismatic people, etc.) without being tall (or good-looking, or charismatic, etc.).
(E) Irrelevant. Without additional assumptions, a length of service differential neither bolsters nor undermines the journalist's argument.