condition mean min max ZT0-3 8.60791 8.09314 9.122679999999999 ZT4-7 9.603295 9.603295 9.603295 ZT8-11 7.444435 7.444435 7.444435 ZT12-15 0 0 0 ZT16-19 7.8095300000000005 7.8095300000000005 7.8095300000000005 ZT20-23 9.845915000000002 9.845915000000002 9.845915000000002