condition mean min max ZT0-3 304.412142 304.412142 304.412142 ZT4-7 402.8174325 402.8174325 402.8174325 ZT8-11 440.1675735 440.1675735 440.1675735 ZT12-15 406.6478295 406.6478295 406.6478295 ZT16-19 503.109615 503.109615 503.109615 ZT20-23 603.4499129999999 603.4499129999999 603.4499129999999