condition mean min max ZT0-3 33.033248975 27.39427996 38.67221799 ZT4-7 25.6386244225 24.131937035 27.14531181 ZT8-11 13.60725049925 10.125932776 17.0885682225 ZT12-15 18.8558096115 15.554819138000001 22.156800085 ZT16-19 44.7765993925 39.56367008 49.989528705 ZT20-23 84.71221519 64.085010405 105.339419975