def outliers
      return [] if scores.uniq.size < 5
      scores.select { |x| ((mean - x) / std_var).abs > GITHUB_MAGIC }.uniq
    end
def outliers
      return [] if scores.uniq.size < 5
      scores.select { |x| ((mean - x) / std_var).abs > GITHUB_MAGIC }.uniq
    end
Outliers of the set