condition mean min max ZT0-3 0.77500925 0.6578999999999999 0.8921185 ZT4-7 1.896835 1.896835 1.896835 ZT8-11 3.786795 3.786795 3.786795 ZT12-15 0 0 0 ZT16-19 4.604139999999999 4.604139999999999 4.604139999999999 ZT20-23 2.838965 2.838965 2.838965