condition mean min max ZT0-3 52.4719351775 38.46064004 66.483230315 ZT4-7 78.4912892025 71.477932055 85.50464635 ZT8-11 54.430834985 52.78188906 56.07978091 ZT12-15 41.5708988775 41.42279888 41.718998875 ZT16-19 36.842272497500005 36.043474610000004 37.641070385 ZT20-23 29.9735309675 25.476373985000002 34.47068795