condition mean min max ZT0-3 10.779015 10.066279999999999 11.49175 ZT4-7 7.289815 7.289815 7.289815 ZT8-11 13.57225 13.57225 13.57225 ZT12-15 0 0 0 ZT16-19 13.096350000000001 13.096350000000001 13.096350000000001 ZT20-23 12.9113 12.9113 12.9113