condition mean min max ZT0-3 1200.407372 1200.407372 1200.407372 ZT4-7 652.942182 652.942182 652.942182 ZT8-11 636.5082825 636.5082825 636.5082825 ZT12-15 853.3286865 853.3286865 853.3286865 ZT16-19 946.4085885 946.4085885 946.4085885 ZT20-23 884.826033 884.826033 884.826033