The importance of data sources#
Learning objectives#
After working through this topic, you should be able to:
explain why it is important to have a random sample
give an intuitive explanation of selection effects as a missing data problem
recognise some common cases of non-random samples
Materials#
Video with English subtitles:
Download the slides.
Video with German subtitles:
(turn subtitles on in the bottom right corner of the video)