condition mean min max ZT0-3 54.684749999999994 51.3401 58.029399999999995 ZT4-7 53.870999999999995 53.870999999999995 53.870999999999995 ZT8-11 43.588750000000005 43.588750000000005 43.588750000000005 ZT12-15 0 0 0 ZT16-19 62.87425 62.87425 62.87425 ZT20-23 60.8776 60.8776 60.8776