condition mean min max ZT0-3 204.41677307500004 195.72623335000003 213.10731280000002 ZT4-7 177.614263725 159.72913635 195.4993911 ZT8-11 394.736221575 320.67865415 468.793789 ZT12-15 557.2110237750001 523.89160455 590.530443 ZT16-19 281.13459097500004 234.26578345000001 328.0033985 ZT20-23 128.8595119675 97.96753638499999 159.75148754999998