condition mean min max ZT0-3 51.210341 51.210341 51.210341 ZT4-7 113.0599955 113.0599955 113.0599955 ZT8-11 90.04803749999999 90.04803749999999 90.04803749999999 ZT12-15 77.892087 77.892087 77.892087 ZT16-19 61.2140375 61.2140375 61.2140375 ZT20-23 58.441353 58.441353 58.441353