#plotting the density 
curve(df(x, 2, 3), from=0, to=10)
curve(df(x, 3, 2), from=0, to=10)

#simulating from F
n.sim=100000
data=rf(n.sim, 3, 2)
hist(data)
summary(data)
boxplot(data)

#95th quantile
qf(0.95, 3, 2)
#say with a data set with n=20, and p=3
qf(0.95, 3, 20-3-1)
curve(df(x, 3, 20-3-1), from=0, to=10)