condition mean min max ZT0-3 41.468503407499995 31.83542911 51.101577705 ZT4-7 38.4047844825 31.60152596 45.208043005 ZT8-11 37.01115756 26.43939309 47.58292203 ZT12-15 66.31813195 61.42587501 71.21038888999999 ZT16-19 70.475795305 68.39103374000001 72.56055687 ZT20-23 52.6409809975 48.833845135000004 56.44811686