condition mean min max ZT0-3 0.218872366 0.172869926 0.264874806 ZT4-7 0.30633663525 0.18402701449999997 0.42864625599999995 ZT8-11 0.42964483825 0.3521718645 0.507117812 ZT12-15 0.18363374424999998 0.0706413515 0.29662613699999996 ZT16-19 0.038329209999999996 0.029117887 0.047540532999999996 ZT20-23 0.0415811595 0.0230616815 0.0601006375