| The middle value with half of the data above and half below it | |
| An error that occurs when a researcher concludes that the independent variable had no effect on the dependent variable, when in truth it did; a "false negative" Source: CHH, 2 Ed. | |
| A type of distribution that involves the probability distribution of sample statistics based on randomly selected samples. | |
| The branch of statistics that includes numerical, graphical, and tabular methods for organizing and summarizing data |