condition mean min max ZT0-3 220.245146 220.245146 220.245146 ZT4-7 545.9868815 545.9868815 545.9868815 ZT8-11 512.9890375 512.9890375 512.9890375 ZT12-15 453.251496 453.251496 453.251496 ZT16-19 318.646895 318.646895 318.646895 ZT20-23 352.833028 352.833028 352.833028