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Independent variables. The equation of the fitted model is
I = 11,5189*Irr - 0,255662*Yl + 9,61605*Ll + 5,50888*Pl
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 98,791% of the variability in I. The adjusted R-squared
statistic, which is more suitable for comparing models with different
numbers of independent variables, is 98,6399%. (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 71,1542.
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 56,7763 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 greater
than 1.4, there is probably not any serious autocorrelation in the
residuals.
In determining whether the model can be simplified, notice that the
highest P-value on the independent variables is 0,0133, belonging to
Irr. 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 2MNK1 C
-----------------------------------------------------------------------------
Dependent variable: C
-----------------------------------------------------------------------------
Standard T
Parameter Estimate Error Statistic P-Value
-----------------------------------------------------------------------------
Tr -12355,2 2520,69 -4,90152 0,0001
Kl 0,820133 0,12713 6,45113 0,0000
Ll 30,4469 8,94116 3,40526 0,0023
time -173,854 30,6324 -5,67548 0,0000
-----------------------------------------------------------------------------
Analysis of Variance
-----------------------------------------------------------------------------
Source Sum of Squares Df Mean Square F-Ratio P-Value
-----------------------------------------------------------------------------
Model 1,52866E8 4 3,82165E7 4243,35 0,0000
Residual 216149,0 24 9006,2
-----------------------------------------------------------------------------
Total 1,53082E8 28
R-squared = 99,8588 percent
R-squared (adjusted for d.f.) = 99,8412 percent
Standard Error of Est. = 94,901
Mean absolute error = 63,7582
Durbin-Watson statistic = 2,32269
The StatAdvisor
---------------
The output shows the results of fitting a multiple linear
regression model to describe the relationship between C and 4