Distribution of β values according to photometric redshift. Heights of boxes represent the 25% and 75% quartiles of the data. Horizontal lines inside the box indicate the median value for each redshift bin. Vertical error bars span the central 2-σ of the data. Numbers above the median in each box state the number of LBG candidates assigned to each bin. Even though there is not a z_ph ∼ 4 band from drop-out selection, there are candidates in that bin.