condition mean min max ZT0-3 36.116150000000005 26.033 46.1993 ZT4-7 59.12555 59.12555 59.12555 ZT8-11 8.353175 8.353175 8.353175 ZT12-15 0 0 0 ZT16-19 5.01482 5.01482 5.01482 ZT20-23 43.04505 43.04505 43.04505