condition mean min max ZT0-3 272.063 272.063 272.063 ZT4-7 269.6745 269.6745 269.6745 ZT8-11 276.033 276.033 276.033 ZT12-15 244.70600000000002 244.70600000000002 244.70600000000002 ZT16-19 327.19550000000004 327.19550000000004 327.19550000000004 ZT20-23 276.1205 276.1205 276.1205