Researchers are conducting a meta-analysis when they combine the results of several previous studies to gain stronger conclusions than the individual studies on their own.
A meta-analysis is a quantitative, formal, epidemiological study design that is used to systematically assess the findings of previous research in order to draw conclusions about that body of work. The study is typically, but not always, based on randomized, controlled clinical trials.
A researcher is someone who conducts research, which is a systematic and organized investigation into something. Scientists are frequently referred to as researchers.
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