Anova results explanation

[DrakeGis]

Hi,
   Perhaps is a silly question, but is my first time working with ANOVA
and I don't understand the meaning of the output of ANOVA function in
OCTAVE.
   I'm running ANOVA test on some data and I have the following results...

   What is the meaning of p-value ??? Is Octave taking 95% of confidence,
or 97.5% ? What if p-value is greater or equal to 1 ???
   Thanks


    Drake.

Here are some results....


One-way ANOVA Table:

Source of Variation   Sum of Squares    df  Empirical Var
*********************************************************
Between Groups               50.4100     1        50.4100
Within Groups               372.5800    98         3.8018
---------------------------------------------------------
Total                       422.9900    99

Test Statistic f             13.2594
p-value                       0.0004

ans = 0.00043552




One-way ANOVA Table:

Source of Variation   Sum of Squares    df  Empirical Var
*********************************************************
Between Groups              110.2500     1       110.2500
Within Groups               336.5000    98         3.4337
---------------------------------------------------------
Total                       446.7500    99

Test Statistic f             32.1085
p-value                       0.0000

ans =  1.4648e-07



One-way ANOVA Table:

Source of Variation   Sum of Squares    df  Empirical Var
*********************************************************
Between Groups               11.5600     1        11.5600
Within Groups               269.0800    98         2.7457
---------------------------------------------------------
Total                       280.6400    99

Test Statistic f              4.2102
p-value                       0.0428

ans = 0.042849


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