condition mean min max ZT0-3 30.408052 30.408052 30.408052 ZT4-7 42.7690025 42.7690025 42.7690025 ZT8-11 32.319389 32.319389 32.319389 ZT12-15 39.9824 39.9824 39.9824 ZT16-19 79.8491235 79.8491235 79.8491235 ZT20-23 103.2366835 103.2366835 103.2366835