IMathAS-libretexts

A study was done on the graduation rates (graduate in 4 years versus did not graduate) from two university: Mode College and Median University. Data were collected for the year 2012 in a variety of majors and it was found that Mode College does better overall (i.e., has a higher percentage of students, who graduate in 4 years). However, in each of the majors separately, Median University does better.

(a.) This is an example of Sipson's Paradox.
(b.) This is an example of a negative relationship between two variables.
(c.) This situation is mathematically impossible.
(d.) "The Type Major" is could be a lurking variable in this example.
(e.) Both (a.) and (d.) are correct.

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