condition mean min max ZT0-3 7.630463165 5.1625020180000005 10.098424312 ZT4-7 6.630958017999999 6.6146991915 6.6472168445 ZT8-11 13.342251157749999 9.6177973505 17.066704965 ZT12-15 21.8594580375 21.675135955000002 22.04378012 ZT16-19 18.814095952499997 18.765786175 18.86240573 ZT20-23 18.9802867175 18.292083445 19.668489989999998