condition mean min max ZT0-3 1670.78042 1670.78042 1670.78042 ZT4-7 1359.415345 1359.415345 1359.415345 ZT8-11 1492.1662035 1492.1662035 1492.1662035 ZT12-15 1805.8755535 1805.8755535 1805.8755535 ZT16-19 2300.238195 2300.238195 2300.238195 ZT20-23 1519.91087 1519.91087 1519.91087