condition mean min max ZT0-3 43.617343 43.617343 43.617343 ZT4-7 47.5703525 47.5703525 47.5703525 ZT8-11 45.23974 45.23974 45.23974 ZT12-15 39.6771745 39.6771745 39.6771745 ZT16-19 46.5173315 46.5173315 46.5173315 ZT20-23 41.7486205 41.7486205 41.7486205