condition mean min max ZT0-3 9.519314999999999 9.519314999999999 9.519314999999999 ZT4-7 8.689855 8.689855 8.689855 ZT8-11 5.051444999999999 5.051444999999999 5.051444999999999 ZT12-15 4.71736 4.71736 4.71736 ZT16-19 9.069135 9.069135 9.069135 ZT20-23 8.59601 8.59601 8.59601