condition mean min max ZT0-3 2368.6499999999996 2368.6499999999996 2368.6499999999996 ZT4-7 1300.5 1300.5 1300.5 ZT8-11 1207.0500000000002 1207.0500000000002 1207.0500000000002 ZT12-15 1896.45 1896.45 1896.45 ZT16-19 2025.35 2025.35 2025.35 ZT20-23 2150.95 2150.95 2150.95