condition mean min max ZT0-3 1463.675096 1463.675096 1463.675096 ZT4-7 423.2025315 423.2025315 423.2025315 ZT8-11 537.45448 537.45448 537.45448 ZT12-15 598.488282 598.488282 598.488282 ZT16-19 1827.0403045 1827.0403045 1827.0403045 ZT20-23 2631.572086 2631.572086 2631.572086