condition mean min max ZT0-3 13.844453 13.844453 13.844453 ZT4-7 13.030653000000001 13.030653000000001 13.030653000000001 ZT8-11 12.82295 12.82295 12.82295 ZT12-15 10.9863855 10.9863855 10.9863855 ZT16-19 10.883388499999999 10.883388499999999 10.883388499999999 ZT20-23 13.734277500000001 13.734277500000001 13.734277500000001