condition mean min max ZT0-3 113.3 113.3 113.3 ZT4-7 48.4 48.4 48.4 ZT8-11 72.1 72.1 72.1 ZT12-15 26.200000000000003 26.200000000000003 26.200000000000003 ZT16-19 60.849999999999994 60.849999999999994 60.849999999999994 ZT20-23 70.4 70.4 70.4