condition mean min max ZT0-3 117.452551 117.452551 117.452551 ZT4-7 44.159084 44.159084 44.159084 ZT8-11 24.7410785 24.7410785 24.7410785 ZT12-15 30.7772625 30.7772625 30.7772625 ZT16-19 43.949391 43.949391 43.949391 ZT20-23 32.13086 32.13086 32.13086