condition mean min max ZT0-3 9.978277 9.978277 9.978277 ZT4-7 11.116027500000001 11.116027500000001 11.116027500000001 ZT8-11 10.746502 10.746502 10.746502 ZT12-15 10.148226 10.148226 10.148226 ZT16-19 10.668396999999999 10.668396999999999 10.668396999999999 ZT20-23 11.5362295 11.5362295 11.5362295