I have confusion about the definition of Plancerel measure for finite groups. Let $G$ be a finite group.
In the following link we see that the Plancherel measure on $\hat G$ is given by $\mu(\pi)=\dim(\pi)$ where $\dim(\pi)$ denotes the dimension of the irreducible representation $\pi$
http://www.stieltjes.org/archief/rep9899/node13.html
On the other hand, in wikipedia, it is given by $\mu(\pi)=\frac{(\dim(\pi))^2}{|G|}$ https://en.wikipedia.org/wiki/Plancherel_measure
Why are the results different? Which problem should I consider to compute the Plancherel measure for finite group? Thanks.