condition mean min max ZT0-3 7.056722468999999 6.234980157999999 7.87846478 ZT4-7 10.76427252825 9.069337986499999 12.459207070000001 ZT8-11 12.073587785 11.16737255 12.979803020000002 ZT12-15 19.0424303675 18.274040915 19.81081982 ZT16-19 18.1209626375 16.558437304999998 19.68348797 ZT20-23 19.485544505 17.90124809 21.06984092