Finally, p-value was obtained by (M+1)/(N+1) (M is the rank of observed stMRPP statistic among simulated stMRPP statistics; N is the number of simulations).
Let { r1, r2… rN] be the rank of observed drug pairs (Npairs in total) from the most synergistic to the most antagonistic in a specific dataset, with { p1, p2,… p N ] predicted ranks calculated by the model.
A bivariate analysis in ASReml [ 27] of the ranks of observed and predicted phenotypes, with a fixed effect for each subset (from 1 to 5), was used to calculate the Spearman rank correlation and corresponding standard error across the five validation sets [ 27].
The formula for Spearman correlation coefficient is ∑ i ((X i - X ¯ ) (Y i - Y ¯ ) ) ∑ i (X i - X ¯ ) 2 ∑ i (Y i - Y ¯ ) 2, where, Xi and Yi are the ranks of observed data values, X ¯ is the mean of Xi's, and Y ¯ is the mean of Yi's.
The nonparametric tests use the ranks of observed titers to calculate the significance of differences among groups and are unaffected by the value chosen to represent titers below the initial dilution or greater than the highest dilution used in the individual assays.
Each subset contained medical, surgical and diagnostic specialties, with one specialty in each quartile of the global ranking of specialties observed in the MIR 2010 selection cycle.
The rank of each observed positional peak among these simulated distributions established the p-value.
The results show that the re-ranking of scenarios observed for the rate of inbreeding was mirrored in the correlation between ETBV of sibs.
We also compared the tariffs in terms of ranking observed EQ-5D-3L health states using Spearman's rank correlation.
