Hedges' g is a well-liked summary evaluate for steady facts that is definitely standardized to be able to reduce scale distinctions, but it incorporates an index of variation involving groups: δ = μ t − μ c σ , displaystyle delta = frac mu _ t -mu _ c sigma http://casestudysolution61112.imblogs.net/517162/the-best-side-of-case-study-help