condition mean min max ZT0-3 1490.7 1490.7 1490.7 ZT4-7 1064.1 1064.1 1064.1 ZT8-11 1141.25 1141.25 1141.25 ZT12-15 1403.4499999999998 1403.4499999999998 1403.4499999999998 ZT16-19 1568.75 1568.75 1568.75 ZT20-23 1645.8000000000002 1645.8000000000002 1645.8000000000002