condition mean min max ZT0-3 49.11665 44.11305 54.12025 ZT4-7 23.753700000000002 23.753700000000002 23.753700000000002 ZT8-11 18.6939 18.6939 18.6939 ZT12-15 0 0 0 ZT16-19 39.61395 39.61395 39.61395 ZT20-23 33.5463 33.5463 33.5463