Enteroliths are calcifications that form in the gut of horses. The stones can cause considerable morbidity and mortality. A study was conducted to investigate factors (such as age, diet, and environment) that may be related to the formation of enteroliths. The researchers decided to draw two histograms: one for horses with enteroliths (cases) and one for horses without (controls). It can be deduced from the histograms that the cases are:
A)slightly younger than the controls.
B)slightly older than the controls.
C)about the same age as the controls.
D)None of the answer options is correct.

Question

Enteroliths are calcifications that form in the gut of horses. The stones can cause considerable morbidity and mortality. A study was conducted to investigate factors (such as age, diet, and environment) that may be related to the formation of enteroliths. The researchers decided to draw two histograms: one for horses with enteroliths (cases) and one for horses without (controls).  It can be deduced from the histograms that the cases are:
A)slightly younger than the controls. 
B)slightly older than the controls. 
C)about the same age as the controls. 
D)None of the answer options is correct.

Quizplus · Accepted Answer

The histogram for cases (horses with enteroliths) shows a peak around age 7-8 years, while the histogram for controls (horses without enteroliths) shows a peak around age 9-10 years. This suggests that cases are slightly younger than the controls.

Enteroliths Are Calcifications That Form in the Gut of Horses