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2011 May 24
2
Problem with visualization of power of t test
Dear R-User,
I'm trying to visualize the results of the power calculation with the function power.t.test(). Therefore I want to plot the related t-distributions and shade the surfaces indicatingt the type I error, the type II error and the power. For sample sizes greater 30 I got results which are very satisfying. For small sample sizes I got stuck and did'nt find a mistake.
To show you the problem I wrote some lines in R:
par(mfrow = c(4,2))
for(n in c(2,6,10,14,18,22,26,30))
{
?temp...
2011 May 24
1
power.t.test visualization problem
Dear R-User,
I'm trying to visualize the results of the power calculation with the
function power.t.test(). Therefore I want to plot the related
t-distributions and shade the surfaces indicatingt the type I error,
the type II error and the power. For sample sizes greater 30 I got
results which are very satisfying. For small sample sizes I got stuck
and did'nt find a mistake.
To show you the problem I wrote some lines in R:
par(mfrow = c(4,2))
for(n in c(2,6,10,14,18,22,26,30))
{...