| A table containing counts for two categorical variables. It has r rows and c columns. | |
| Estimation of an unknown quantity between two known quantities historical data, or drawing conclusions about missing information from the available information. | |
| A sampling scheme that biases the sample in a way that gives a part of the population less representation than it has in the population | |
| A constant in the equation of a curve that can be varied to yield a family of similar curves |