condition mean min max ZT0-3 21.958533333333335 12.718 37.9127 ZT4-7 25.3211 25.3211 25.3211 ZT8-11 17.22065 17.22065 17.22065 ZT12-15 30.926049999999996 24.01535 37.836749999999995 ZT16-19 22.6156 22.6156 22.6156 ZT20-23 24.59355 24.59355 24.59355