Some formulas you may find helpful From table 11.1 EPD=b(Xx)EPD=1/2EBV Where: b= regression coefficient X= individual's performance xc== average performance of contemporary group Standard Error of Prediction or Possible Change (PC)=(1ACC3)n2 Where : SPD2=1/4SBV2 (sBV2h2sp2) Relative Accuracy = (Accuracy of progeny OR Accuracy of halfsibs)/(Accuracy of individual) 1. Compute accuracy's for the following situations (h2=.3) : a. Prediction based on the individual's own phenotypic record. b. Prediction based on 100 half sibs of the individual (One record per individual). c. Prediction based on 20 progeny of the individual (One record per individual)..