Most data sets can be described by a single data matrix, but some have a more complex structure. We briefly mention another type of data called multi-level data.

Each data matrix can be separately analysed.


Household survey

Analysis of the separate data matrices

Difficulties with interpretation

Both group-level and individual-level data matrices can be analysed with the methods described in this e-book, but interpreting the results of the analysis requires a lot of careful thought!

Advanced statistical methods are needed to fully analyse multi-level data.