condition mean min max ZT0-3 15.675800000000002 15.493000000000002 15.858600000000001 ZT4-7 21.716 21.716 21.716 ZT8-11 16.2825 16.2825 16.2825 ZT12-15 0 0 0 ZT16-19 21.2207 21.2207 21.2207 ZT20-23 32.74735 32.74735 32.74735