condition mean min max ZT0-3 10.22982130475 9.5967800795 10.86286253 ZT4-7 8.504888722 7.9169327025000005 9.092844741499999 ZT8-11 9.97808371575 9.4265588015 10.52960863 ZT12-15 13.425068815 10.723299005 16.126838625 ZT16-19 20.459430859999998 17.189175905 23.729685815 ZT20-23 32.952251864999994 30.404315564999997 35.500188165