The lecture Experiments and Observational Studies by David Spade, PhD is from the course Statistics Part 1. It contains the following chapters:
When we use records from past observations to evaluate the responses, what type of study have we conducted?
Why are observational studies useful?
What is a difference between an observational study and an experiment?
What is the relationship for a variable that masks the effect of another variable?
What are ‘experimental units’?
Who are the ‘subjects’ in the context of experiments?
What is a control treatment?
What is the type of blinding for a study in which only one of the parties (i.e. either the subject or the researcher) knows what treatment the subject is receiving?
What type of blinding is described when neither of the parties (i.e. either the subject or the researcher) knows which treatment the subject is receiving?
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