condition mean min max ZT0-3 87.032073075 77.75864302000001 96.30550313 ZT4-7 39.530478865 35.744909105000005 43.31604862499999 ZT8-11 30.218226565000002 29.914172055 30.522281075000002 ZT12-15 12.140162450999998 6.8483542955 17.4319706065 ZT16-19 4.636045631 4.40374433 4.868346932 ZT20-23 3.79621617675 2.6489345805 4.943497773