阅读理解
In many countries, winter is from December to February. Autumn is 3 months before winter. In the autumn, leaves drop to the ground. Many trees have nuts or fruits. Animals may begin to store food. Some birds collect nuts to store. Other birds fly to a warmer place for the winter. They won't return until the spring. Days become shorter. Cold weather is coming. The fur of many animals gets thick because they need a thick coat to protect themselves. People also wear warmer clothes, because the weather is a little colder. In some places there may be rain or even snow, but in many southern places it is still warm. Autumn is also the time when farmers harvest their crops. People look forward to( 盼望) autumn for many reasons. The most important one is that autumn is the harvest season.
两变量的线性相关性做实验，并用回归分析方法分别求得相关系数
与残差平方和
如下表：