Time magazine reported in the late 1950s that "the average Yaleman, class of 1924, makes $ 25,111 a year," which would be equivalent to well over $ 150,000 today (the sexism in this sentence was not in Time's statement but in Yale's admission policies in the 1920s: only men were admitted to Yale in those days). Time's estimate turns out to have been based on replies received to a sample survey questionnaire mailed to those members of the Yale class of 1924 whose addresses were known in the late 1950s by the Yale administration.



Explain briefly.