condition mean min max ZT0-3 12.2159725 9.697305 14.734639999999999 ZT4-7 49.3678 49.3678 49.3678 ZT8-11 4.99669 4.99669 4.99669 ZT12-15 0 0 0 ZT16-19 4.820905 4.820905 4.820905 ZT20-23 0.0 0.0 0.0