Sampling Sizes – No Easy Answers
As inside and outside counsel struggle with ever larger ESI collections, the question of appropriate sample sizes for quality assurance pops up on the national lists, conference panels and in social gatherings of law geeks. There are many different statistical theories that can be used to calculate the relative probability that the results of a sample set can be extrapolated against the total collection. In simpler terms, sampling is used to define how confident we are in an assertion when we have not or cannot review every single item due to scale, availability, cost or time. This is expressed as the Confidence Interval or Confidence Range. Do not worry, I am not a statistician and have no intention of even trying to translate significance levels, variability parameters or estimation errors. Instead, I will talk about how sampling can apply to the discovery process.