condition mean min max ZT0-3 10.9265832165 7.419811168 14.433355265 ZT4-7 22.5437400925 18.5308997 26.556580484999998 ZT8-11 37.29626299 30.42100636 44.17151962 ZT12-15 21.1651804225 13.245349715 29.08501113 ZT16-19 10.014274216250001 9.456607082000001 10.571941350500001 ZT20-23 8.313591803 7.654428471 8.972755135