wrong questions

Comparing treatments to control the effects of lurking variables is known as:
Randomized Comparative Experiments

The best method for testing causation would be:
Experimentation

False. The placebo effect is not a part of equal treatment.

The simplest statistical design for an experiment is:
Completely randomized experimental design

An experiment to compare the amount of usage of single serve coffee machines as opposed to regular brew coffee machines will want to look separately at the usage patterns of men and women coffee drinkers. The experiment randomly assigns the men to two groups, one to use single serve coffee machines, the other to use a regular brew coffee machine. The women are assigned in the same fashion. They will then compare the usage of coffee machines with each group. This is an example of:
Block experimental design

The Coke versus Pepsi experiment—where Coke drinkers tasted both Coke and Pepsi from glasses without brand markings and said which they liked better—is an example of:
pairs