condition mean min max ZT0-3 133.047015 133.047015 133.047015 ZT4-7 143.16903 143.16903 143.16903 ZT8-11 123.644152 123.644152 123.644152 ZT12-15 142.89439 142.89439 142.89439 ZT16-19 142.645319 142.645319 142.645319 ZT20-23 129.5673765 129.5673765 129.5673765