condition mean min max ZT0-3 735.91846 735.91846 735.91846 ZT4-7 472.64663099999996 472.64663099999996 472.64663099999996 ZT8-11 360.2655075 360.2655075 360.2655075 ZT12-15 440.191281 440.191281 440.191281 ZT16-19 377.974648 377.974648 377.974648 ZT20-23 551.6675309999999 551.6675309999999 551.6675309999999