condition mean min max ZT0-3 0.5147725 0.0 1.029545 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0 0 0 ZT16-19 1.01514 1.01514 1.01514 ZT20-23 0.0 0.0 0.0