condition mean min max ZT0-3 9.85981811925 8.8807831685 10.83885307 ZT4-7 6.1658344565 5.5890775415 6.7425913715 ZT8-11 9.0453086975 7.7046151604999995 10.3860022345 ZT12-15 9.61489134 9.242142016999999 9.987640663 ZT16-19 6.7706130095 6.432011671 7.109214348 ZT20-23 11.132131280500001 9.612870936 12.651391625