condition mean min max ZT0-3 394.121825 394.121825 394.121825 ZT4-7 394.39934900000003 394.39934900000003 394.39934900000003 ZT8-11 395.205383 395.205383 395.205383 ZT12-15 385.4041805 385.4041805 385.4041805 ZT16-19 427.4923505 427.4923505 427.4923505 ZT20-23 463.5610925 463.5610925 463.5610925