condition mean min max ZT0-3 58.91038 58.91038 58.91038 ZT4-7 57.9497635 57.9497635 57.9497635 ZT8-11 59.9004065 59.9004065 59.9004065 ZT12-15 53.585848500000004 53.585848500000004 53.585848500000004 ZT16-19 83.42296 83.42296 83.42296 ZT20-23 75.856157 75.856157 75.856157