condition mean min max ZT0-3 19.894554 19.894554 19.894554 ZT4-7 142.80672550000003 142.80672550000003 142.80672550000003 ZT8-11 361.1280775 361.1280775 361.1280775 ZT12-15 148.053237 148.053237 148.053237 ZT16-19 39.359729 39.359729 39.359729 ZT20-23 19.8859845 19.8859845 19.8859845