condition mean min max ZT0-3 648.408652 648.408652 648.408652 ZT4-7 410.1307965 410.1307965 410.1307965 ZT8-11 302.3266625 302.3266625 302.3266625 ZT12-15 362.350462 362.350462 362.350462 ZT16-19 183.1557105 183.1557105 183.1557105 ZT20-23 204.2975625 204.2975625 204.2975625