condition mean min max ZT0-3 26.6834975 20.459345000000003 32.907650000000004 ZT4-7 1.53641 1.53641 1.53641 ZT8-11 2.592595 2.592595 2.592595 ZT12-15 0 0 0 ZT16-19 6.0732800000000005 6.0732800000000005 6.0732800000000005 ZT20-23 3.5586349999999998 3.5586349999999998 3.5586349999999998