condition mean min max ZT0-3 1.405205 1.405205 1.405205 ZT4-7 0.786392 0.786392 0.786392 ZT8-11 0.74332 0.74332 0.74332 ZT12-15 2.873495 2.873495 2.873495 ZT16-19 1.9004999999999999 1.9004999999999999 1.9004999999999999 ZT20-23 1.49021 1.49021 1.49021