condition mean min max ZT0-3 423.114085 423.114085 423.114085 ZT4-7 574.150142 574.150142 574.150142 ZT8-11 451.501847 451.501847 451.501847 ZT12-15 572.8117345000001 572.8117345000001 572.8117345000001 ZT16-19 670.7123684999999 670.7123684999999 670.7123684999999 ZT20-23 980.956619 980.956619 980.956619