condition mean min max ZT0-3 35.516357 35.516357 35.516357 ZT4-7 19.809879 19.809879 19.809879 ZT8-11 26.2884155 26.2884155 26.2884155 ZT12-15 209.10657750000001 209.10657750000001 209.10657750000001 ZT16-19 55.068719 55.068719 55.068719 ZT20-23 271.2784445 271.2784445 271.2784445