condition mean min max ZT0-3 57.473487 57.473487 57.473487 ZT4-7 158.9356135 158.9356135 158.9356135 ZT8-11 173.623647 173.623647 173.623647 ZT12-15 121.21988300000001 121.21988300000001 121.21988300000001 ZT16-19 90.187918 90.187918 90.187918 ZT20-23 94.4069115 94.4069115 94.4069115