lt6_3_1.m

<数理统计与MATLAB工程数据分析> 清华大学出版社 随书代码

%例题6.3.1
%给出向量x和y，利用下面的程序代码可以
%绘制散点图、求出方差分析表、求出回归线，
%并在一个图像窗口中画出散点图和回归线图，
%还计算出可决系数r2和最小二乘回归的估计标准误差Sy
x=[76.9,82.7,80.1,77.1,82.4,85.1,87.4,85.2,82.6,86.5,77.6,76.1,73.7,87.6,73.1,69.7,70.2,68.7,64.1,86,104.5,90.7,89.7,67.5,66.1,68.8,69.7,72.5,73.6,73.2,71.6,80.7,68.5,64.2];
y=[65,74.2,69.8,76.1,75.3,77.4,76.7,77.4,76.7,75.5,67.2,66.2,64.1,76.1,68.4,67.2,64.9,65.7,60.8,77.9,95.8,80.2,80.2,63.6,61.9,64.7,62.9,66.4,63.1,67.4,68.9,70.3,64.6,59.6];
%%%%%%%%以下为计算部分不可改动
xxhg1(x,y);