condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.02839795 0.02839795 0.02839795 ZT8-11 0.08631145 0.08631145 0.08631145 ZT12-15 0 0 0 ZT16-19 0.02828795 0.02828795 0.02828795 ZT20-23 0.0283671 0.0283671 0.0283671