condition mean min max ZT0-3 49.175174999999996 44.23185 54.1185 ZT4-7 42.98235 42.98235 42.98235 ZT8-11 22.825400000000002 22.825400000000002 22.825400000000002 ZT12-15 0 0 0 ZT16-19 44.6793 44.6793 44.6793 ZT20-23 64.0441 64.0441 64.0441