condition mean min max ZT0-3 44.8928 44.0797 45.7059 ZT4-7 36.76455 36.76455 36.76455 ZT8-11 17.273850000000003 17.273850000000003 17.273850000000003 ZT12-15 0 0 0 ZT16-19 28.9792 28.9792 28.9792 ZT20-23 47.4634 47.4634 47.4634