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Sas Programming

Autor:   •  January 20, 2016  •  Course Note  •  4,394 Words (18 Pages)  •  1,070 Views

Page 1 of 18

Name: Yixin Wang

G25050287                                                                                                  

1. What is the population Regression function? (“GNP” is dependent, and “Invest,” “CPI” and “Interest” are independent)

                                       Parameter Estimates

                                    Parameter       Standard

               Variable     DF       Estimate          Error    t Value    Pr > |t|

               Intercept     1     -529.60744       18.04051     -29.36      <.0001

               Invest        1        1.32541        0.12318      10.76      <.0001

               CPI           1       14.18311        0.38217      37.11      <.0001

               Interest      1        6.54153        3.05829       2.14      0.0557

 Y = α + β1X1 + β2X2 + β3X3 + u

Y = -529.607+ 1.325 (X1) +14.183(X2) + 6.541(X3) + u

Note however that the coefficient for X3 is insignificant

proc reg data=exmpl;

     model GNP=Invest CPI Interest;

         run;

2. Is this regression function significant overall (state the null and alternative hypotheses and explain how you reached that conclusion)?

                                    Analysis of Variance

                                              Sum of           Mean

          Source                   DF        Squares         Square    F Value    Pr > F

          Model                     3        7625333        2541778    10368.1    <.0001

          Error                    11     2696.68581      245.15326

          Corrected Total          14        7628029

 H0: β1=β2=β3= 0

None of the independent variables offer any predictability of the dependent variable in the population.

HA: NOT (β1=β2=β3= 0)

At least one of the independent variables offer some predictability of the dependent variable in the population.

...

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