condition mean min max ZT0-3 9.034875 6.388705 11.681045000000001 ZT4-7 35.50325 35.50325 35.50325 ZT8-11 14.19365 14.19365 14.19365 ZT12-15 0 0 0 ZT16-19 17.5081 17.5081 17.5081 ZT20-23 14.450395 14.450395 14.450395