condition mean min max ZT0-3 9.678106 9.678106 9.678106 ZT4-7 11.556632 11.556632 11.556632 ZT8-11 10.736557999999999 10.736557999999999 10.736557999999999 ZT12-15 10.612312 10.612312 10.612312 ZT16-19 10.313066 10.313066 10.313066 ZT20-23 11.194471499999999 11.194471499999999 11.194471499999999