condition mean min max ZT0-3 196.663032 196.663032 196.663032 ZT4-7 130.1003225 130.1003225 130.1003225 ZT8-11 132.8029565 132.8029565 132.8029565 ZT12-15 167.7274405 167.7274405 167.7274405 ZT16-19 163.616672 163.616672 163.616672 ZT20-23 179.002897 179.002897 179.002897