Modeling CumPHits Curve
Fitting log10(CumPHits(P)) = a + b log10(P)
Average over all regressions:
a = 0.04 +0.03; b = 0.53 + 0.09
Central Estimate:
log10(CumPHits(P)) ~ 0.04 + 0.53 log10(1/P)
CumPHits(P) = 1.1 P 0.53
Range: 1.02 P 0.44 to 1.17 P 0.62