condition mean min max ZT0-3 45.589962 45.589962 45.589962 ZT4-7 57.6615295 57.6615295 57.6615295 ZT8-11 29.383187 29.383187 29.383187 ZT12-15 30.807312500000002 30.807312500000002 30.807312500000002 ZT16-19 30.9802525 30.9802525 30.9802525 ZT20-23 27.999025500000002 27.999025500000002 27.999025500000002