condition mean min max ZT0-3 60.644435 60.644435 60.644435 ZT4-7 95.1982785 95.1982785 95.1982785 ZT8-11 97.60172349999999 97.60172349999999 97.60172349999999 ZT12-15 81.550306 81.550306 81.550306 ZT16-19 75.13931550000001 75.13931550000001 75.13931550000001 ZT20-23 60.541235 60.541235 60.541235