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Power comparisons based on 200 CEPH families in a homogeneous population without parental phenotypes. (a) The power comparisons for different values of R and r1 in the top R and exponential weighting methods (see Table 3 for the values of R and r1 corresponding to each scale on the x axis). (b) The power comparisons for different values of heritability h when R and r1 in the top R and exponential weighting methods are chosen by their optimal values.
