condition mean min max ZT0-3 10.4853712045 6.840670717999999 14.130071691000001 ZT4-7 16.8726757075 16.579463355 17.16588806 ZT8-11 9.13454972575 6.4730518955 11.796047556000001 ZT12-15 5.90381063575 4.344668551 7.462952720500001 ZT16-19 10.19573530175 9.3843940195 11.007076584 ZT20-23 10.51305334575 10.3375209565 10.688585735