Question

in a study, the effects of the mane of a male lion as a signal of quality to mates and rivals was explored. four life - sized dummies of male lions provided a tool for testing female response to the unfamiliar lions whose manes varied by length (long or short) and color (blonde or dark). the female lions were observed to see whether they approached each of the four life - sized dummies. complete parts (a) through (c) below.
a. identify the experimental units. choose the correct answer below.
the mane lengths
the male dummies
the mane colors
the female lions

Explanation:

Experimental units are the entities on which an experiment is performed. In this study, the female lions are the ones being observed to see their response to the male dummies (with varying manes). Mane lengths and colors are factors, and male dummies are the stimuli, but the experimental units are the subjects (female lions) whose response is measured.

Answer:

D. The female lions