Using the per capita disposable income PDI(yuan) and per capita consumption expenditure PCE(yuan) of urban residents in Guangdong Province during 1979-2008 as regression, the consumption function was established with PCE as the dependent variable and PDI as the independent variable. Data from Guangdong Statistical Yearbook (2009). Using Eviews5.0, the estimated results are as follows:

(1) Fill out the question mark part in the regression results, and estimate the variance of the overall random disturbance term .

(2) Report the regression analysis results.

(3) Test the significance of parameters and explain the meaning of R².

(4) Explain the economic meaning of the regression coefficient β of PDI.