condition mean min max ZT0-3 1.3950955 1.156496 1.633695 ZT4-7 1.155905 1.155905 1.155905 ZT8-11 1.17462 1.17462 1.17462 ZT12-15 0 0 0 ZT16-19 1.458885 1.458885 1.458885 ZT20-23 1.5178850000000002 1.5178850000000002 1.5178850000000002