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Independent variables. The equation of the fitted model is
U = 0,00248284*Y - 0,0411792*P + 0,0389703*W
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 95,9196% of the variability in U. The adjusted R-squared
statistic, which is more suitable for comparing models with different
numbers of independent variables, is 95,6174%. (Note: since the model
does not contain a constant, you should be careful in interpreting the
R-Squared values. Do not compare these R-Squared values with those of
models which do contain a constant.) The standard error of the
estimate shows the standard deviation of the residuals to be 1,24286.
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 0,844691 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 0,8143, belonging to
W. Since the P-value is greater or equal to 0.10, that term is not
statistically significant at the 90% or higher confidence level.
Consequently, you should consider removing W from the model.
Multiple Regression Analysis U.2
-----------------------------------------------------------------------------
Dependent variable: U
-----------------------------------------------------------------------------
Standard T
Parameter Estimate Error Statistic P-Value
-----------------------------------------------------------------------------
Y 0,00273705 0,000274087 9,98607 0,0000
P -0,0453775 0,010476 -4,33158 0,0002
-----------------------------------------------------------------------------
Analysis of Variance
-----------------------------------------------------------------------------
Source Sum of Squares Df Mean Square F-Ratio P-Value
-----------------------------------------------------------------------------
Model 980,336 2 490,168 328,39 0,0000
Residual 41,7936 28 1,49263
-----------------------------------------------------------------------------
Total 1022,13 30
R-squared = 95,9111 percent
R-squared (adjusted for d.f.) = 95,7651 percent
Standard Error of Est. = 1,22173
Mean absolute error = 0,842834
Durbin-Watson statistic = 0,579204
The StatAdvisor
---------------
The output shows the results of fitting a multiple linear
regression model to describe the relationship between U and 2