| A | B |
|---|
| Continuous variables | variables which can assume an unlimited number of intermediate values. |
| Discrete variables | variables which have equality of counting units. |
| Discontinuous variables | variables which have equality of counting units. |
| Interval scale | a scale in which exact distances can be known between categories. The zero point in this scale is arbitrary |
| Measurement | the assignment of numbers to objects or events according to sets of predetermined (or arbitrary) rules. |
| Nominal numbers | numbers used to name. |
| Nominal scale | scales in which the categories are homogeneous |
| Ordinal numbers | numbers used to represent position or order in a series. |
| Ordinal scale | a scale in which the classes can be rank-ordered |
| Percentage | a proportion that has been multiplied by 100. |
| Proportion | a value calculated by dividing the quantity in one category by the total ofall the components. |
| Rate | a ratio of the occurrences in a group category to the total number of elements in the group with which we are concerned. |
| Ratio | the number of cases in one category divided by the number of cases in another category. |
| Ratio scale | the same as interval scale |
| True limits of a number | the true limits of a value of a continuous variable are equal to that number plus or minus one-half of the unit of measurement. |
| Variable | any characteristic of a person |
