Samples, bias and study design
Making an experiment fair: control, random assignment, replication, blocking, placebo and blinding
Analyse Lucía's randomised, blocked reading-club trial, see why a control group is needed, and name the parts of a fair experiment.
This lesson is part of the paid path
Enrol in Principles of Statistics for Data Analysis to unlock this lesson and the rest of the course. The preview lessons stay free.