condition mean min max ZT0-3 43.088711 43.088711 43.088711 ZT4-7 44.2595575 44.2595575 44.2595575 ZT8-11 44.095349 44.095349 44.095349 ZT12-15 54.735724000000005 54.735724000000005 54.735724000000005 ZT16-19 127.200334 127.200334 127.200334 ZT20-23 123.25113049999999 123.25113049999999 123.25113049999999