condition mean min max ZT0-3 7.47096 5.822115 9.119805 ZT4-7 2.443445 2.443445 2.443445 ZT8-11 3.710425 3.710425 3.710425 ZT12-15 0 0 0 ZT16-19 4.95089 4.95089 4.95089 ZT20-23 2.426845 2.426845 2.426845