Excel can be used to find the probability of obtaining a given F-ratio or one more extreme (calculates the area under the curve to the left of the value).  The function requires the F-ratio, the degrees of freedom for the numerator and the degrees of freedom for the denominator (entered in that order).

For our example, we will use $\displaystyle {F}={2.61}$, $\displaystyle {d}{f}_{{\text{between}}}={3}$ and $\displaystyle {d}{f}_{{\text{within}}}={24}$.
=FDIST(2.61,3,24) Enter this into Excel to confirm you obtain the value 0.07476.

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You conduct a one-factor ANOVA with 5 groups and 10 subjects in each group (a balanced design) and obtain $\displaystyle {F}={2.9}$.  Use Excel to find the requested values (report accurate to 4 decimal places).
$\displaystyle {d}{f}_{{\text{between}}}=$
$\displaystyle {d}{f}_{{\text{within}}}=$
$\displaystyle {p}=$