condition mean min max ZT0-3 334.847175 334.847175 334.847175 ZT4-7 387.1256175 387.1256175 387.1256175 ZT8-11 339.0012875 339.0012875 339.0012875 ZT12-15 377.0693075 377.0693075 377.0693075 ZT16-19 361.886824 361.886824 361.886824 ZT20-23 235.4438515 235.4438515 235.4438515