condition mean min max ZT0-3 8.0144175 7.0739149999999995 8.954920000000001 ZT4-7 10.064779999999999 10.064779999999999 10.064779999999999 ZT8-11 31.30235 31.30235 31.30235 ZT12-15 0 0 0 ZT16-19 30.25855 30.25855 30.25855 ZT20-23 13.4744 13.4744 13.4744