condition mean min max ZT0-3 3.4511600000000002 2.8198 3.79453 ZT4-7 1.50528 1.50528 1.50528 ZT8-11 3.715035 3.715035 3.715035 ZT12-15 4.6662099999999995 3.910595 5.421825 ZT16-19 4.13133 4.13133 4.13133 ZT20-23 3.3200700000000003 3.3200700000000003 3.3200700000000003