condition mean min max ZT0-3 11.232434999999999 11.232434999999999 11.232434999999999 ZT4-7 13.781849999999999 13.781849999999999 13.781849999999999 ZT8-11 13.51265 13.51265 13.51265 ZT12-15 12.74775 12.74775 12.74775 ZT16-19 10.686015000000001 10.686015000000001 10.686015000000001 ZT20-23 12.2846 12.2846 12.2846