condition mean min max ZT0-3 1495.3000000000002 1495.3000000000002 1495.3000000000002 ZT4-7 2266.6 2266.6 2266.6 ZT8-11 1934.25 1934.25 1934.25 ZT12-15 1588.15 1588.15 1588.15 ZT16-19 1225.5 1225.5 1225.5 ZT20-23 1344.1 1344.1 1344.1