condition mean min max ZT0-3 3.75431543875 1.9986527614999998 5.509978116 ZT4-7 8.1945960275 1.127568503 15.261623552 ZT8-11 91.63127199249999 67.45810174 115.80444224499999 ZT12-15 103.4190005975 85.312571045 121.52543014999999 ZT16-19 53.506055867499995 50.488088489999996 56.524023245 ZT20-23 54.763790915 51.57490642 57.95267541