condition mean min max ZT0-3 2100.045 1946.595 2253.495 ZT4-7 2655.12 2655.12 2655.12 ZT8-11 2045.4850000000001 2045.4850000000001 2045.4850000000001 ZT12-15 0 0 0 ZT16-19 1077.18 1077.18 1077.18 ZT20-23 1197.4250000000002 1197.4250000000002 1197.4250000000002