condition mean min max ZT0-3 111.6 111.6 111.6 ZT4-7 57.7 57.7 57.7 ZT8-11 24.45 24.45 24.45 ZT12-15 101.45 101.45 101.45 ZT16-19 127.0 127.0 127.0 ZT20-23 141.45 141.45 141.45