condition mean min max ZT0-3 44.008746 44.008746 44.008746 ZT4-7 33.515226999999996 33.515226999999996 33.515226999999996 ZT8-11 58.762729 58.762729 58.762729 ZT12-15 56.585554 56.585554 56.585554 ZT16-19 48.289364 48.289364 48.289364 ZT20-23 44.6905365 44.6905365 44.6905365