condition mean min max ZT0-3 127.467849 127.467849 127.467849 ZT4-7 58.281544999999994 58.281544999999994 58.281544999999994 ZT8-11 59.772585500000005 59.772585500000005 59.772585500000005 ZT12-15 92.482869 92.482869 92.482869 ZT16-19 86.809294 86.809294 86.809294 ZT20-23 52.982423 52.982423 52.982423