condition mean min max ZT0-3 0.03252323 0.0 0.06504646 ZT4-7 0.41021256575 0.11688254149999999 0.70354259 ZT8-11 1.8098366712499998 1.341968458 2.2777048845 ZT12-15 3.8422511605 2.6813720475 5.0031302735 ZT16-19 2.97113464825 2.5930535345 3.349215762 ZT20-23 4.39501099725 4.195992186 4.5940298085