condition mean min max ZT0-3 13.221525769 11.724476048 14.71857549 ZT4-7 8.96838199275 8.0880111455 9.84875284 ZT8-11 8.934554331 8.539668493499999 9.3294401685 ZT12-15 8.733265234000001 8.082210107 9.384320361 ZT16-19 17.486882700000002 12.430393630000001 22.54337177 ZT20-23 47.4662599675 37.208942695000005 57.72357724