condition mean min max ZT0-3 12.1005 11.716000000000001 12.485 ZT4-7 9.81015 9.81015 9.81015 ZT8-11 14.14265 14.14265 14.14265 ZT12-15 0 0 0 ZT16-19 19.0211 19.0211 19.0211 ZT20-23 13.25295 13.25295 13.25295