condition mean min max ZT0-3 22.46044 7.909370000000001 38.58125 ZT4-7 7.406034999999999 7.406034999999999 7.406034999999999 ZT8-11 9.018115 9.018115 9.018115 ZT12-15 10.332014999999998 8.28393 12.380099999999999 ZT16-19 11.350249999999999 11.350249999999999 11.350249999999999 ZT20-23 18.321550000000002 18.321550000000002 18.321550000000002