- Ratio
Ratio is very similar to Interval data, with the added feature of being able to accommodate absolute zeros (for example, a ruler has an absolute zero, so it is a ratio scale, but a thermometer has a relative zero, making it an interval scale). Variable type: Named + Ordered + Proportionate Intervals + Absolute Zeros
- Rebased
Since all percentages are a fraction of some larger base, sometimes it’s helpful to re-define that base to make sense of a percentage — this is called rebasing. For example, if you ask a question to a smaller group of people and want to know how many of them said “yes,” you can either look at them as a percentage of only the people who responded to that question, or you can look at them as a percentage of everyone in the study. Changing the base that the percentage is using is called “rebasing.”
- Response Rate
Response Rate is a calculation that illustrates the participation level of those invited to participate in the study. (For example, if 5,000 individuals are invited to participate in a study and 1,427 individuals complete the study, the participation rate is 28.5%.) Average response rates vary broadly by industry and source of participants.
