| A | B |
|---|
| bias | systematic favoring of certain outcomes |
| voluntary response sample | chooses itself - write in or call in polls |
| convenience sampling | selection of whichever individuals are easeist to reach |
| SRS | every set of individuals has an equal chance of being in sample |
| independent | knowledge of one thing gives no info. about the other |
| sample | gives info about the population |
| parameter | number that describes a population |
| statistic | describes a sample |
| variability | describes how spread out the values of a statistic are |
| random | will reduce bias |
| increase sample size | will reduce variability |
| margin of error | 1/sq. rt of n |
