condition mean min max ZT0-3 9.86266 9.86266 9.86266 ZT4-7 7.596475 7.596475 7.596475 ZT8-11 8.894895 8.894895 8.894895 ZT12-15 9.163170000000001 9.163170000000001 9.163170000000001 ZT16-19 9.808345 9.808345 9.808345 ZT20-23 9.011790000000001 9.011790000000001 9.011790000000001