condition mean min max ZT0-3 35.43793333333333 29.787999999999997 39.6439 ZT4-7 28.884900000000002 28.884900000000002 28.884900000000002 ZT8-11 35.5159 35.5159 35.5159 ZT12-15 48.30135 47.81235 48.790350000000004 ZT16-19 51.21525 51.21525 51.21525 ZT20-23 58.04600000000001 58.04600000000001 58.04600000000001