Figure 1.
Simulation results for mSRI and CMI under the null of no SNP-expression association for a range of expression-trait effect sizes. Type-1 error is estimated as the proportion of simulations for which the test statistic H0: γ = 0 is significant at the 0.05 level. Coverage is the proportion of 95% confidence intervals that cover the true parameter value used for the simulation – under the complete null, coverage is the same as one minus the type-1 error rate. Estimation error is defined as the difference between the estimated parameter for association between expression and the trait and the true value used for the simulation (=0 in this example). (a) Power (type-1 error rate) and coverage. (b) Absolute deviation (median and IQR).