condition mean min max ZT0-3 34.3365111025 32.130044840000004 36.542977365 ZT4-7 28.694100210000002 26.214147790000002 31.17405263 ZT8-11 33.068875265 29.53692519 36.60082534 ZT12-15 31.24963586 30.83710639666667 31.662165323333333 ZT16-19 36.439208191666665 35.82182722333333 37.05658916 ZT20-23 36.58273839333333 35.27050568 37.89497110666667