condition mean min max ZT0-3 91.47949 91.47949 91.47949 ZT4-7 11.083453500000001 11.083453500000001 11.083453500000001 ZT8-11 8.6632465 8.6632465 8.6632465 ZT12-15 75.4751605 75.4751605 75.4751605 ZT16-19 13.043005 13.043005 13.043005 ZT20-23 49.093812 49.093812 49.093812