condition mean min max ZT0-3 78.956975 78.956975 78.956975 ZT4-7 142.608175 142.608175 142.608175 ZT8-11 123.76720833333333 123.76720833333333 123.76720833333333 ZT12-15 74.16890000000001 74.16890000000001 74.16890000000001 ZT16-19 78.2758 78.2758 78.2758 ZT20-23 90.57895 90.57895 90.57895