condition mean min max ZT0-3 56.96445 49.715900000000005 64.213 ZT4-7 66.3316 66.3316 66.3316 ZT8-11 41.8249 41.8249 41.8249 ZT12-15 0 0 0 ZT16-19 43.02005 43.02005 43.02005 ZT20-23 58.98885 58.98885 58.98885