condition mean min max ZT0-3 2612.1000000000004 2612.1000000000004 2612.1000000000004 ZT4-7 2934.9 2934.9 2934.9 ZT8-11 2822.05 2822.05 2822.05 ZT12-15 2228.75 2228.75 2228.75 ZT16-19 2615.65 2615.65 2615.65 ZT20-23 2874.95 2874.95 2874.95