condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.21897156716666666 0.0 0.4379431343333333 ZT8-11 0.0 0.0 0.0 ZT12-15 0.0 0.0 0.0 ZT16-19 0.029351478 0.0 0.058702956 ZT20-23 0.0 0.0 0.0