Enteroliths Are Calcifications That Form in the Gut of a Horse

Multiple Choice

Enteroliths are calcifications that form in the gut of a horse. The stones can cause considerable morbidity and mortality. A study was conducted to investigate factors (such as diet and environment) that may be related to the formation of enteroliths. The study contained seven stallions; their ages (in years) are as follows: The youngest stallion, at 4 years old, is:

A) an outlier, because it is more than 15 years below the lower quartile.
B) an outlier, because it is the minimum.
C) not an outlier, because it is less than 15 years below the lower quartile.
D) not an outlier, because it is a positive value.