condition mean min max ZT0-3 0.5947629999999999 0.5947629999999999 0.5947629999999999 ZT4-7 0.31195399999999995 0.31195399999999995 0.31195399999999995 ZT8-11 0.06211195 0.06211195 0.06211195 ZT12-15 0.08023715 0.08023715 0.08023715 ZT16-19 0.1962645 0.1962645 0.1962645 ZT20-23 0.54152 0.54152 0.54152