condition mean min max ZT0-3 1352.232057 1352.232057 1352.232057 ZT4-7 3300.5067335 3300.5067335 3300.5067335 ZT8-11 3653.198583 3653.198583 3653.198583 ZT12-15 3429.555097 3429.555097 3429.555097 ZT16-19 2330.47183 2330.47183 2330.47183 ZT20-23 2404.9660945 2404.9660945 2404.9660945