In an experiment, all horses are given a special food designed to hold down their weight.A random selection of the horses are kept in one area and receive one hour of exercise daily, while the remaining horses are kept separately and receive four hours of exercise daily.The researcher measures the weight change in all horses after one month of eating the special food, to see if the food has had any consequences regarding weight of the horses.Which variable does the sample of horses limited to one hour of exercise daily represent?
A)dependant
B)independent
C)random
D)reflective

Question

Quizplus · Accepted Answer

The sample of horses limited to one hour of exercise daily represents the independent variable because it is the variable that is being manipulated by the researcher. The researcher is testing the effect of exercise on weight change, so the amount of exercise is the independent variable.

In an Experiment, All Horses Are Given a Special Food