condition mean min max ZT0-3 4.4927525 4.307155 4.67835 ZT4-7 3.79971 3.79971 3.79971 ZT8-11 11.83935 11.83935 11.83935 ZT12-15 0 0 0 ZT16-19 11.44915 11.44915 11.44915 ZT20-23 7.0429949999999995 7.0429949999999995 7.0429949999999995