condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.20808979325 0.1445349065 0.27164467999999997 ZT8-11 0.5334361887500001 0.508681203 0.5581911745000001 ZT12-15 0.5303625995 0.4373159125 0.6234092864999999 ZT16-19 0.8020221755 0.787380629 0.8166637219999999 ZT20-23 0.6368000549999999 0.5289787595 0.7446213504999999