condition mean min max ZT0-3 0.7003325 0.0 1.400665 ZT4-7 0.3564755 0.3564755 0.3564755 ZT8-11 2.126777 2.126777 2.126777 ZT12-15 0 0 0 ZT16-19 1.3771200000000001 1.3771200000000001 1.3771200000000001 ZT20-23 1.3840599999999998 1.3840599999999998 1.3840599999999998