condition mean min max ZT0-3 0.3579438333333333 0.0 1.0738314999999998 ZT4-7 1.3482115000000001 1.3482115000000001 1.3482115000000001 ZT8-11 0.8148645 0.8148645 0.8148645 ZT12-15 0.7463695100000001 0.24955952 1.2431795 ZT16-19 0.542762 0.542762 0.542762 ZT20-23 0.113823 0.113823 0.113823