condition mean min max ZT0-3 640.2209098000001 427.056117 853.3857026000001 ZT4-7 281.4353782 264.9310723 297.9396841 ZT8-11 242.372419025 231.92919925 252.8156388 ZT12-15 365.18548247499996 292.19988255 438.1710824 ZT16-19 687.430411175 550.79361685 824.0672055 ZT20-23 1185.94072225 1125.595581 1246.2858635