|Module 3: Interpreting Data
5.2 What types of relationship might exist between two quantitative variables?
5.2.1 Deterministic relationship
In some circumstances, if we know the value of one variable we can calculate the exact value of another. The relationship between the two variables is deterministic and is governed by a mathematical function. In such a deterministic relationship, there is perfect association between the variables. This is not usually the case for relationships measured between variables in contexts which involve sampled data. An example of such a deterministic relationship is when two variables measure the same thing but on different scales. Temperature measurements on the Fahrenheit scale (F) and on the Celsius scale (C) are such a relationship which is represented by the equation F = 32 + 1.8 C
This page last updated 31 August 2009