condition mean min max ZT0-3 13.99315 13.460450000000002 14.52585 ZT4-7 15.83905 15.83905 15.83905 ZT8-11 19.07375 19.07375 19.07375 ZT12-15 0 0 0 ZT16-19 22.28455 22.28455 22.28455 ZT20-23 24.01945 24.01945 24.01945