condition mean min max ZT0-3 45.204112 45.204112 45.204112 ZT4-7 38.790633 38.790633 38.790633 ZT8-11 39.4981315 39.4981315 39.4981315 ZT12-15 40.924009 40.924009 40.924009 ZT16-19 36.854736 36.854736 36.854736 ZT20-23 41.8515365 41.8515365 41.8515365