condition mean min max ZT0-3 790.467125 790.467125 790.467125 ZT4-7 781.5024005 781.5024005 781.5024005 ZT8-11 860.9478895 860.9478895 860.9478895 ZT12-15 904.5014945 904.5014945 904.5014945 ZT16-19 1012.4494375 1012.4494375 1012.4494375 ZT20-23 1058.651285 1058.651285 1058.651285