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The functions transforms a vector of Hedges g values to their equivalent point bi-serial values.
transformHgtoR(g, Nc, Nt)
value of point biserial r
A vector of Hegdes g values.
A vector of numbers identifying the number of control condition participants in each group
A vector of numbers identifying the number of treatment condition participants in each group
Barbara Kitchenham and Lech Madeyski
transformHgtoR(0.4, 20, 20) # [1] 0.1961161
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