condition mean min max ZT0-3 14.19585 14.19585 14.19585 ZT4-7 12.2447 12.2447 12.2447 ZT8-11 9.698455 9.698455 9.698455 ZT12-15 12.5139 12.5139 12.5139 ZT16-19 15.86785 15.86785 15.86785 ZT20-23 14.82165 14.82165 14.82165