| A | B |
| ratio | A comparison of two quantities using division. |
| equivalent ratios | Two ratios that describe the same relationship. |
| rate | A ratio of two quantities with different units. |
| unit rate | A rate that compares a quantity to one unit of another quantity. |
| unit cost | A unit rate for cost per unit. |
| range | The difference between the greatest value and the least value of a data set. |
| outlier | A data value that is much greater or much less than the other values. |
| measure of central tendency | A measure that represents the center of a data set. |
| median | The middle data value or the mean of the two middle values. |
| mode | The data value or values that occur most often. |
| mean | The sum of the values in a data set divided by the number of data values. |