condition mean min max ZT0-3 4.544213628 3.248513175 5.839914081 ZT4-7 10.38913439825 8.0366268115 12.741641985000001 ZT8-11 12.21787681875 10.686040644999999 13.749712992500001 ZT12-15 12.14524008 9.00923528 15.28124488 ZT16-19 7.49849034225 7.0966480605 7.900332624000001 ZT20-23 7.7752152932500005 7.668032764500001 7.882397822