condition mean min max ZT0-3 106.802938 106.802938 106.802938 ZT4-7 81.499189 81.499189 81.499189 ZT8-11 62.795325000000005 62.795325000000005 62.795325000000005 ZT12-15 67.1080025 67.1080025 67.1080025 ZT16-19 43.750873 43.750873 43.750873 ZT20-23 51.9439775 51.9439775 51.9439775