100 500 1000 1500 2000 Number of samples 0.2 0.4 0.6 0.8 1.0 Rejection rate CIFAR 10 v.s. CIFAR 10.1 KQD, = ( P n + Q n )/2 KQD, = (IQR/1.349) × N (0, 1) KQD, = IQR× U [0, 1] MMD