| A | B |
|---|
| complementary events | Two events in which either one or the other must take place, but they cannot both happen at the same time. The sum of their probabilities is 1. |
| event | A specific outcome or type of outcome. |
| independent events | Two or more events in which the outcome of one event does not affect the outcome(s) of the other event(s). |
| outcomes | Possible results of a probability event. |
| population | The entire group of items or individuals from which the samples under consideration are taken. |
| random | A variety of outcomes that are equally likely to occur. |
| sample | A randomly-selected group that is used to represent a whole population. |
| sample space | The set of all possible outcomes in a probability experiment. |
| survey | A question or set of questions designed to collect data about a specific group of people. |
| theoretical probability | The ratio of the number of ways an event can occur to the number of possible outcomes. |
| tree diagram | A diagram used to show the total number of possible outcomes in a probability experiment. |
