condition mean min max ZT0-3 1430.4 1430.4 1430.4 ZT4-7 1239.1 1239.1 1239.1 ZT8-11 1329.0 1329.0 1329.0 ZT12-15 1410.55 1410.55 1410.55 ZT16-19 1430.8000000000002 1430.8000000000002 1430.8000000000002 ZT20-23 1425.5 1425.5 1425.5