The F distribution is used during Analysis of Variance (ANOVA) for hypothesis testing of data sets with more than 2 samples (or treatments). This sketch shows how F varies as dn, the degrees of freedom of the numerator, and dd, the degrees of freedom of the denominator, vary. The applet begins with df of the numerator animated and df of the denominator fixed at 25. Click on dn to stop that animation, and then turn on the animation of df of the denominator.

Does the F curve appear to approach symmetry for the interval of df permitted here? __________________________

How would you describe the F curve? _______________________

Ans. Does ot approach symmetry.

Right skewed. Dependent on values of df of the numerator and df of the denominator.

Statistics, G. Battaly

Created with GeoGebra – Shared by gbattaly View as Java Applet View as HTML5 Applet