condition mean min max ZT0-3 33.8975057125 33.257230435 34.53778099 ZT4-7 42.975318255 40.54312663666666 45.40750987333333 ZT8-11 45.285301905 42.08509069 48.48551312 ZT12-15 42.916676073333335 42.56398042666667 43.269371719999995 ZT16-19 45.27111228 44.07239867 46.46982589 ZT20-23 45.23440444 43.72922886 46.73958002