condition mean min max ZT0-3 0.9538464999999999 0.6682655 1.1681949999999999 ZT4-7 1.6446 1.6446 1.6446 ZT8-11 0.680154 0.680154 0.680154 ZT12-15 1.359255 1.054405 1.664105 ZT16-19 1.812886 1.812886 1.812886 ZT20-23 0.48155749999999997 0.48155749999999997 0.48155749999999997