| A | B |
|---|
| Mean | The average of a data set |
| Median | The middle number of a data set |
| Mode | The most often occurring number in a data set |
| Range | The difference between the highest and lowest number in a data set |
| Standard Deviation | The comparison of how close a score comes to the mean |
| Normal Distribution Curve | Looks like a "Bell"... shows the distribution of scores compared to the mean |
| Hypothesis | A prediction on the cause-effect relationship of two variables |
| Theory | An explanation for the relationships between things |
| Independent Variable | What the experimenter manipulates (changes) to see its effect |
| Dependent Variable | The measured changes that occur during an experiment |
| Correlation | Shows how two variables are related |
| Positive Correlation | Indicates that as one variable increases, so to with the other |
| Negative Correlation | Indicates that as one variable increases, the other decreases (it is an inverse relationship) |
| Survey | A questionnaire |
| Sample | A portion of the entire group you wish to study |
| Control Group | The subjects in an experiment that serve as your "baseline" comparison |
| Experimental Group | The subjects in an experiment that receive the independent variable |
| Case Study | An intensive analysis of a person, group, event, or problem |
| Experiment | A controlled setting in which researchers are trying to discover cause-effect relationships |
