99% Confidence level.

The R-Squared statistic indicates that the model as fitted

explains 98,2058% of the variability in W. The adjusted R-squared

statistic, which is more suitable for comparing models with different

numbers of independent variables, is 98,1418%. (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 1,90352.

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 1,52481 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 0,0000, belonging to

P. Since the P-value is less than 0.01, the highest order term is

statistically significant at the 99% confidence level. Consequently,

you probably don't want to remove any variables from the model.

Multiple Regression Analysis W.3

-----------------------------------------------------------------------------

Dependent variable: W

-----------------------------------------------------------------------------

Standard T

Parameter Estimate Error Statistic P-Value

-----------------------------------------------------------------------------

CONSTANT 12,0749 0,198178 60,9295 0,0000

P 0,0195033 0,00212576 9,17474 0,0000

-----------------------------------------------------------------------------

Analysis of Variance

-----------------------------------------------------------------------------

Source Sum of Squares Df Mean Square F-Ratio P-Value

-----------------------------------------------------------------------------

Model 20,3135 1 20,3135 84,18 0,0000

Residual 6,75702 28 0,241322

-----------------------------------------------------------------------------

Total (Corr.) 27,0705 29

R-squared = 75,0392 percent

R-squared (adjusted for d.f.) = 74,1477 percent

Standard Error of Est. = 0,491245

Mean absolute error = 0,339409

Durbin-Watson statistic = 0,673563

The StatAdvisor

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The output shows the results of fitting a multiple linear

regression model to describe the relationship between W and 1