condition mean min max ZT0-3 67.0731 67.0731 67.0731 ZT4-7 48.8297 48.8297 48.8297 ZT8-11 32.9002 32.9002 32.9002 ZT12-15 34.8482 34.8482 34.8482 ZT16-19 56.7338 56.7338 56.7338 ZT20-23 68.1358 68.1358 68.1358