condition mean min max ZT0-3 75.79828221166667 63.69570924333333 87.90085518000001 ZT4-7 59.06078646833333 50.92485297 67.19671996666666 ZT8-11 89.28957543499999 77.44159166 101.13755920999999 ZT12-15 58.68335845 54.99734326 62.36937364 ZT16-19 75.610364225 75.57896703 75.64176142 ZT20-23 54.670311985 50.944621080000005 58.39600289