condition mean min max ZT0-3 39.603529802500006 31.98907501 47.217984595000004 ZT4-7 33.5564176 30.612869765 36.499965435 ZT8-11 15.76566877725 13.56885135 17.9624862045 ZT12-15 17.435814497499997 14.75639257 20.115236425 ZT16-19 33.2729924025 27.989892805 38.556092 ZT20-23 60.331356275 52.46951591 68.19319664