Transformations: Logged variables
Learning Outcomes
On watching this video, students should be able to:
- Explain what a non-linear transformation is and identify the log transformation as a type of non-linear transformation.
- Explain what can be achieved with a log transformation and identify situations when it may be useful.
- Interpret each unit difference on the log scale as a multiplicative difference on the anti-logged (back transformed) scale
- Interpret the mean and mean difference calculated from log transformed data after they have been back transformed to the original scale