condition mean min max ZT0-3 783.675111 783.675111 783.675111 ZT4-7 584.7491835000001 584.7491835000001 584.7491835000001 ZT8-11 575.4185185 575.4185185 575.4185185 ZT12-15 647.89513 647.89513 647.89513 ZT16-19 736.7945595 736.7945595 736.7945595 ZT20-23 572.111562 572.111562 572.111562