condition mean min max ZT0-3 30.4703 30.4703 30.4703 ZT4-7 24.8169 24.8169 24.8169 ZT8-11 28.363549999999996 28.363549999999996 28.363549999999996 ZT12-15 32.1674 32.1674 32.1674 ZT16-19 36.8136 36.8136 36.8136 ZT20-23 36.39845 36.39845 36.39845