Ratio level is the highest level of measurement. They are distinguished from internal scales by virtue of having an absolute zero. Ratio scale provides information regarding : Rank Ordering, interval between object, Absolute zero.
The statistic applicable: All type of statistical procedures are applicable. The ratio level is distinguished from interval level by having a zero point that really means zero. In research the distinction between Interval and Ratio measurement is really not needed because both use the same statistical tests. Therefore, it is more efficient to group them in one category. Some authors group them as "Measurable" (Continuous data). The following example shows how ratio or interval level data can be presented in Table 5.3. For example, if we are looking at the income of villagers by occupational category might present them in the following table. Here the income is an interval level data.