condition mean min max ZT0-3 4.510232500000001 4.293620000000001 4.726845 ZT4-7 3.72853 3.72853 3.72853 ZT8-11 3.47267 3.47267 3.47267 ZT12-15 0 0 0 ZT16-19 10.723025 10.723025 10.723025 ZT20-23 5.133990000000001 5.133990000000001 5.133990000000001