Use the Distributions tool to help you answer the following question.
To use the tool to find the critical value of F, set both the numerator and the denominator degrees of freedom; this will show you the appropriate F distribution. Move the orange line until the area in the tail is equivalent to the alpha level you are investigating.
Find out what happens when you decrease the df for error. As you decrease the df for error, the critical value of F . When you increase the number of groups, the critical value of F . Finally, when you increase the alpha, the critical value of F .