condition mean min max ZT0-3 45.512915 45.512915 45.512915 ZT4-7 68.20558700000001 68.20558700000001 68.20558700000001 ZT8-11 51.408813499999994 51.408813499999994 51.408813499999994 ZT12-15 46.1085725 46.1085725 46.1085725 ZT16-19 29.163043000000002 29.163043000000002 29.163043000000002 ZT20-23 21.669589000000002 21.669589000000002 21.669589000000002