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Independent variables. The equation of the fitted model is
W = 13,4472 + 0,0176211*P - 21,7858*Ur
Since the P-value in the ANOVA table is less than 0.01, there is a
statistically significant relationship between the variables at the
99% Confidence level.
The R-Squared statistic indicates that the model as fitted
explains 79,0721% of the variability in W. The adjusted R-squared
statistic, which is more suitable for comparing models with different
numbers of independent variables, is 77,5219%. The standard error of
the estimate shows the standard deviation of the residuals to be
0,458067. This value can be used to construct prediction limits for
new observations by selecting the Reports option from the text menu.
The mean absolute error (MAE) of 0,338887 is the average value of the
residuals. The Durbin-Watson (DW) statistic tests the residuals to
determine if there is any significant correlation based on the order
in which they occur in your data file. Since the DW value is less
than 1.4, there may be some indication of serial correlation. Plot
the residuals versus row order to see if there is any pattern which
can be seen.
In determining whether the model can be simplified, notice that the
highest P-value on the independent variables is 0,0307, belonging to
Ur. Since the P-value is less than 0.05, that term is statistically
significant at the 95% confidence level. Consequently, you probably
don't want to remove any variables from the model.
Multiple Regression Analysis W.2
-----------------------------------------------------------------------------
Dependent variable: W
-----------------------------------------------------------------------------
Standard T
Parameter Estimate Error Statistic P-Value
-----------------------------------------------------------------------------
P 0,0455632 0,00707622 6,43892 0,0000
Ur 173,288 11,6535 14,87 0,0000
-----------------------------------------------------------------------------
Analysis of Variance
-----------------------------------------------------------------------------
Source Sum of Squares Df Mean Square F-Ratio P-Value
-----------------------------------------------------------------------------
Model 5553,24 2 2776,62 766,31 0,0000
Residual 101,454 28 3,62337
-----------------------------------------------------------------------------
Total 5654,69 30
R-squared = 98,2058 percent
R-squared (adjusted for d.f.) = 98,1418 percent
Standard Error of Est. = 1,90352
Mean absolute error = 1,52481
Durbin-Watson statistic = 0,628284
The StatAdvisor
---------------
The output shows the results of fitting a multiple linear
regression model to describe the relationship between W and 2
Independent variables. The equation of the fitted model is
W = 0,0455632*P + 173,288*Ur
Since the P-value in the ANOVA table is less than 0.01, there is a
statistically significant relationship between the variables at the