condition mean min max ZT0-3 386.565042 386.565042 386.565042 ZT4-7 374.6251645 374.6251645 374.6251645 ZT8-11 532.9616295000001 532.9616295000001 532.9616295000001 ZT12-15 378.6551335 378.6551335 378.6551335 ZT16-19 501.5535725 501.5535725 501.5535725 ZT20-23 360.10204550000003 360.10204550000003 360.10204550000003