Stratified sampling is a sampling method that in no way involves simple random sampling.
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Q5: Increasing sample size will generally eliminate bias
Q6: Clusters are non-overlapping subgroups of a population
Q7: Blocking is a technique that can be
Q8: A study is an observational study if
Q9: A control group provides a baseline for
Q11: Selection bias can occur if volunteers only
Q12: Random subpopulations of a population are called
Q13: A placebo is identical in appearance to
Q14: Random assignment of volunteers should result in
Q15: By definition, a simple random sample of
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