condition mean min max ZT0-3 15.824100000000001 15.824100000000001 15.824100000000001 ZT4-7 12.9833 12.9833 12.9833 ZT8-11 15.23935 15.23935 15.23935 ZT12-15 14.7065 14.7065 14.7065 ZT16-19 15.3802 15.3802 15.3802 ZT20-23 12.71655 12.71655 12.71655