condition mean min max ZT0-3 2061.0 2061.0 2061.0 ZT4-7 2022.6 2022.6 2022.6 ZT8-11 2082.45 2082.45 2082.45 ZT12-15 2229.3999999999996 2229.3999999999996 2229.3999999999996 ZT16-19 2282.45 2282.45 2282.45 ZT20-23 2336.05 2336.05 2336.05