condition mean min max ZT0-3 0.42611920860416663 0.36021412581249995 0.468793 ZT4-7 0.1669945 0.1669945 0.1669945 ZT8-11 0.194378 0.194378 0.194378 ZT12-15 0.603271 0.4493875 0.7571545 ZT16-19 0.636787 0.636787 0.636787 ZT20-23 0.4238769055 0.4238769055 0.4238769055