condition mean min max ZT0-3 12.047550000000001 11.0835 13.0116 ZT4-7 22.8181 22.8181 22.8181 ZT8-11 41.4559 41.4559 41.4559 ZT12-15 0 0 0 ZT16-19 36.5161 36.5161 36.5161 ZT20-23 22.852449999999997 22.852449999999997 22.852449999999997