condition mean min max ZT0-3 0.224568225 0.04153845 0.407598 ZT4-7 0.2907925 0.2907925 0.2907925 ZT8-11 0.5366219999999999 0.5366219999999999 0.5366219999999999 ZT12-15 0 0 0 ZT16-19 0.7361025 0.7361025 0.7361025 ZT20-23 0.49195700000000003 0.49195700000000003 0.49195700000000003