Learning Objectives
 Describe the logic by which it can be concluded that someone can distinguish
between two things
 State whether random assignment ensures that all uncontrolled sources
of variation will be equal
 Define precisely what the probability is that is computed to reach
the conclusion that a difference is not due to chance
 Distinguish between the probability of an event and the probability
of a state of the world
 Define "null hypothesis"
 Be able to determine the null hypothesis from a description of an experiment
 Define "alternative hypothesis"
