condition mean min max ZT0-3 24.223262 24.223262 24.223262 ZT4-7 28.7851055 28.7851055 28.7851055 ZT8-11 34.6937245 34.6937245 34.6937245 ZT12-15 47.9044705 47.9044705 47.9044705 ZT16-19 37.6939685 37.6939685 37.6939685 ZT20-23 24.825373 24.825373 24.825373