Normalized χ² distribution based on the covariance matrix from the 150 realizations of the fiducial cosmology. We consider 10 bins in peak height with equal numbers of peaks in each bin (on average). Black histograms represent our data and red curve represents a theoretical χ² distribution with 10 degrees of freedom. The top panel shows the distribution for 150 fiducial realizations. The bottom panel is the distribution for 50 realizations with Ω_m increased by 10% from its fiducial value.