condition mean min max ZT0-3 0.3084655 0.2452435 0.3717335 ZT4-7 0.1718005 0.1718005 0.1718005 ZT8-11 0.455177 0.455177 0.455177 ZT12-15 0.6495905 0.37156350000000005 0.9276175 ZT16-19 0.8902574999999999 0.8902574999999999 0.8902574999999999 ZT20-23 0.6782349999999999 0.6782349999999999 0.6782349999999999