condition mean min max ZT0-3 0.018998725 0.0 0.03799745 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0193223 0.0193223 0.0193223 ZT12-15 0 0 0 ZT16-19 0.0 0.0 0.0 ZT20-23 0.01885225 0.01885225 0.01885225