condition mean min max ZT0-3 90.242566 90.242566 90.242566 ZT4-7 77.050071 77.050071 77.050071 ZT8-11 77.9358135 77.9358135 77.9358135 ZT12-15 78.4096135 78.4096135 78.4096135 ZT16-19 72.41631050000001 72.41631050000001 72.41631050000001 ZT20-23 77.8415375 77.8415375 77.8415375