condition mean min max ZT0-3 344.973463 344.973463 344.973463 ZT4-7 412.5651775 412.5651775 412.5651775 ZT8-11 353.29107999999997 353.29107999999997 353.29107999999997 ZT12-15 769.4703455 769.4703455 769.4703455 ZT16-19 374.7212875 374.7212875 374.7212875 ZT20-23 509.7086885 509.7086885 509.7086885