| A | B |
|---|
| Classiscal Probability | uses sample spaces to determine the numerical probability that an event will happen. One does not actually have to perform the experiment to determine that probability. |
| Classical probablilty assumes that all outcomes in the sample space are | equally likely to occur. |
| Equally likely events | are events that have the same probability of occurring |
| Probabilities can be expressed as | fractions, decimals, or-where appropriate-percentages |
| Strictly speaking, a percent | is not a probability; However, probabilities are often expressed as percents |
| If decimals are converted to percentages to express probabilities, | move the point two places to the right and add a percent sign. |
| There are ____ basic probability rules | four |
| Probability Rule 1 | states that probabilities cannot be negative or greater than 1; The probability of any event E is a number (either a fraction or decimal) between and including 0 and 1. This is denoted by 0≤P(E)≤1. |
| Probability Rule 2 | If an event E cannot occur (i.e., the event contains no members in the sample space), its probability is 0. |
| Probability Rule 3 | If an event E is certain, then the probability of E is 1. In other words, if P(E) = 1, then the event E is certain to occur. |
| Probability Rule 4 | The sum of the probabilities of the outcomes in the sample space is 1. |
