condition mean min max ZT0-3 68.15667499999999 48.3294 87.98395 ZT4-7 109.83105 109.83105 109.83105 ZT8-11 43.4572 43.4572 43.4572 ZT12-15 0 0 0 ZT16-19 65.29605000000001 65.29605000000001 65.29605000000001 ZT20-23 94.45845 94.45845 94.45845