condition mean min max ZT0-3 181.46670574 90.78071583 272.15269565 ZT4-7 323.26151425 287.44205915 359.08096935000003 ZT8-11 103.66638061 59.980029665 147.352731555 ZT12-15 16.09050353925 15.271566181 16.9094408975 ZT16-19 34.6097803225 25.92557094 43.293989705 ZT20-23 44.611659915000004 37.825895110000005 51.397424720000004