condition mean min max ZT0-3 23.853 21.77775 25.92825 ZT4-7 9.037565 9.037565 9.037565 ZT8-11 2.439655 2.439655 2.439655 ZT12-15 0 0 0 ZT16-19 3.7680700000000003 3.7680700000000003 3.7680700000000003 ZT20-23 4.785515 4.785515 4.785515