condition mean min max ZT0-3 3.4784 3.4784 3.4784 ZT4-7 0.0 0.0 0.0 ZT8-11 2.71827 2.71827 2.71827 ZT12-15 0.0 0.0 0.0 ZT16-19 3.75714 3.75714 3.75714 ZT20-23 1.853885 1.853885 1.853885