condition mean min max ZT0-3 1370.8000000000002 1370.8000000000002 1370.8000000000002 ZT4-7 776.4 776.4 776.4 ZT8-11 750.55 750.55 750.55 ZT12-15 823.15 823.15 823.15 ZT16-19 863.5999999999999 863.5999999999999 863.5999999999999 ZT20-23 1051.25 1051.25 1051.25