Analysis of Variance

 continuous probability distribution  skewed to the right  variable values on horizontal axis are  0  area under the curve represents probability  horizontal asymptote – extends to infinity along positive horizontal axis\ curve gets closer to horizontal axis but does not touch it as X gets large  The shape of the F distribution is determined by two values for “degrees of freedom”. The degrees of freedom are both written as subscripts. The theoretical mathematical formula for the F probability distribution is a ratio, so the two values for degrees of freedom are associated with the numerator and the denominator of the ratio. The “first” number for degrees of freedom is associated with the numerator; The “second” number for degrees of freedom is associated with the denominator. Notation F df for “numerator”, df for “denominator”