condition mean min max ZT0-3 119.5842 119.5842 119.5842 ZT4-7 159.5117775 159.5117775 159.5117775 ZT8-11 169.260961 169.260961 169.260961 ZT12-15 207.99994249999997 207.99994249999997 207.99994249999997 ZT16-19 224.2233915 224.2233915 224.2233915 ZT20-23 199.845511 199.845511 199.845511