condition mean min max ZT0-3 16.048975 14.42485 17.673099999999998 ZT4-7 9.82277 9.82277 9.82277 ZT8-11 16.9698 16.9698 16.9698 ZT12-15 0 0 0 ZT16-19 18.5733 18.5733 18.5733 ZT20-23 17.407400000000003 17.407400000000003 17.407400000000003