condition mean min max ZT0-3 42.8189 42.248450000000005 43.38934999999999 ZT4-7 40.78435 40.78435 40.78435 ZT8-11 49.6507 49.6507 49.6507 ZT12-15 0 0 0 ZT16-19 65.456 65.456 65.456 ZT20-23 48.8381 48.8381 48.8381