基于R语言在城乡收支水平差距预测的应用-毕业论文

mmary(lm.sol.1)РCall:Рlm(formula = y ~ yn1 + yn3, data = nongcun)РResiduals:Р Min 1Q Median 3Q Max Р-108.73 -62.64 15.98 47.46 109.82 РCoefficients:Р Estimate Std. Error t value Pr(>|t|) Р(Intercept) 113.07182 66.05690 1.712 0.106 Рyn1 0.66460 0.07331 9.065 1.06e-07 ***Рyn3 0.02197 0.01815 1.210 0.244 Р---РSignif. codes: 0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘’ 1 РResidual standard error: 70.43 on 16 degrees of freedomРMultiple R-squared: 0.9941, Adjusted R-squared: 0.9934 РF-statistic: 1352 on 2 and 16 DF, p-value: < 2.2e-16 Р由上述的回归分析可知,农村居民的纯收入(yn1),人均消费支出(yn2),人均储蓄存款余额(yn3)两两之间均显著,但由(4)中可看出yn2与yn1之间显著,yn2与yn3不显著,常数项也不显著。Р数据回归拟合直线和散点图如下:Р图中有部分数据异常,修改数据,删除第6,7,8这3个数据,继续进行回归分析.Рnongcun1<-data.frame(Рyear=c(1990,1991,1992,1993,1994,1998,1999,2000,2001,2002,2003,2004,2005,2006,2007,2008),