The Oklahoma Department of Wildlife Conservation has indicated an increase in late summer and early fall quail numbers. Does this signal a true increase in quail population or is it just a momentary upswing in the long decline of quail in Oklahoma?
Eastern red cedar, which is native to Oklahoma, historically was controlled by fires. Since that isn't the case anymore, land that was once open prairie is covered with cedar and no longer provides grazing for livestock.
A well-designed experiment incorporates all possible ways of minimizing experimental error, because the ability to detect differences among treatments increases as the size of the experimental error decreases.