A designed experiment is described. Identify the specified element of the experiment.
-A herpetologist performed a study on the effects of the body type and mating call of the male bullfrog as signals of quality to mates. Four life-sized dummies of male bullfrogs and two sound Recordings provided a tool for testing female response to the unfamiliar frogs whose bodies varied By size (large or small)and color (dark or light)and whose mating calls varied by pitch (high,Normal, or low). The female bullfrogs were observed to see whether they approached each of the Four life-sized dummies. Identify the factor(s).
A)Large or small, dark or light, high pitch, normal pitch, or low pitch
B)Body type and mating call
C)Whether or not (yes or no)the female frogs approached a male dummy
D)Body size, body color, and mating call pitch

Question

A designed experiment is described. Identify the specified element of the experiment.
-A herpetologist performed a study on the effects of the body type and mating call of the male bullfrog as signals of quality to mates. Four life-sized dummies of male bullfrogs and two sound Recordings provided a tool for testing female response to the unfamiliar frogs whose bodies varied By size (large or small)and color (dark or light)and whose mating calls varied by pitch (high,Normal, or low). The female bullfrogs were observed to see whether they approached each of the Four life-sized dummies. Identify the factor(s). 
A)Large or small, dark or light, high pitch, normal pitch, or low pitch
B)Body type and mating call
C)Whether or not (yes or no)the female frogs approached a male dummy
D)Body size, body color, and mating call pitch

Quizplus · Accepted Answer

Factors in an experiment are the variables that are changed or manipulated to observe their effects on the outcome. In this experiment, the factors are the body size (large or small), body color (dark or light), and mating call pitch (high, normal, or low) of the male bullfrog dummies.

A Designed Experiment Is Described