condition mean min max ZT0-3 1581.8 1581.8 1581.8 ZT4-7 1192.1 1192.1 1192.1 ZT8-11 1373.9499999999998 1373.9499999999998 1373.9499999999998 ZT12-15 1922.6499999999999 1922.6499999999999 1922.6499999999999 ZT16-19 1650.8000000000002 1650.8000000000002 1650.8000000000002 ZT20-23 1442.55 1442.55 1442.55