condition mean min max ZT0-3 30.4037 24.38425 36.42315 ZT4-7 19.24785 19.24785 19.24785 ZT8-11 23.48695 23.48695 23.48695 ZT12-15 0 0 0 ZT16-19 26.36125 26.36125 26.36125 ZT20-23 21.041249999999998 21.041249999999998 21.041249999999998