President Roosevelt relied on staff competition to solve the dependency problem that afflicts all principals who rely on agents for information and advice.

Which of the following points is NOT made in the excerpt from the Constitution?

a. Senators must be at least 30 years old. b. Senators are directly elected by the citizens of their states. c. Senators will have six-year terms. d. Senators must be inhabitants of the state that they represent.

Effects of a single factor in a factorial design are known as

A) main effects. B) the interaction. C) matrix effects. D) cell effects.