condition mean min max ZT0-3 1.42904 1.42904 1.42904 ZT4-7 0.8755545 0.8755545 0.8755545 ZT8-11 0.8022915 0.8022915 0.8022915 ZT12-15 1.43392 1.43392 1.43392 ZT16-19 3.38545 3.38545 3.38545 ZT20-23 2.243885 2.243885 2.243885