condition mean min max ZT0-3 44.78195 44.78195 44.78195 ZT4-7 33.92165 33.92165 33.92165 ZT8-11 37.2595 37.2595 37.2595 ZT12-15 33.604600000000005 33.604600000000005 33.604600000000005 ZT16-19 49.73605 49.73605 49.73605 ZT20-23 47.1342 47.1342 47.1342