condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.0 0.0 0.0 ZT8-11 0.779025112 0.122310221 1.435740003 ZT12-15 0.300233088 0.2089928705 0.3914733055 ZT16-19 0.8768809127500001 0.2014321135 1.5523297120000001 ZT20-23 0.0 0.0 0.0