condition mean min max ZT0-3 13.42635 13.42635 13.42635 ZT4-7 59.13665 59.13665 59.13665 ZT8-11 72.91525 72.91525 72.91525 ZT12-15 6.795345 6.795345 6.795345 ZT16-19 1.30869 1.30869 1.30869 ZT20-23 3.07559 3.07559 3.07559