condition mean min max ZT0-3 543.155134 543.155134 543.155134 ZT4-7 654.6100739999999 654.6100739999999 654.6100739999999 ZT8-11 680.8933565 680.8933565 680.8933565 ZT12-15 722.3167269999999 722.3167269999999 722.3167269999999 ZT16-19 578.7893234999999 578.7893234999999 578.7893234999999 ZT20-23 612.2181475 612.2181475 612.2181475