As mentioned earlier, it is important in any study not only that bias is minimised, but that the sample has sufficient precision (in the case of descriptive studies) or power (in the case of analytic studies).
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As mentioned earlier, it is important in any study not only that bias is minimised, but that the sample has sufficient [[Random variation#Confidence intervals and study precision|precision]] (in the case of descriptive studies) or [[Random variation#Hypothesis testing and study power|power]] (in the case of analytic studies).