condition mean min max ZT0-3 1301.2 1301.2 1301.2 ZT4-7 1225.9 1225.9 1225.9 ZT8-11 1201.1 1201.1 1201.1 ZT12-15 1504.55 1504.55 1504.55 ZT16-19 1472.5500000000002 1472.5500000000002 1472.5500000000002 ZT20-23 1645.8000000000002 1645.8000000000002 1645.8000000000002