condition mean min max ZT0-3 93.65365000000001 67.9418 114.02020000000002 ZT4-7 53.481899999999996 53.481899999999996 53.481899999999996 ZT8-11 51.095600000000005 51.095600000000005 51.095600000000005 ZT12-15 86.981425 74.29445 99.6684 ZT16-19 105.34535 105.34535 105.34535 ZT20-23 129.238 129.238 129.238