Just follow below steps.
================== ============================
cd /home/username/www
ln -s ../tmp/webalizer webalizer
chown username.username webalizer
cd ../tmp
chmod 755 ./
chmod 755 ./webalizer
================== ============================
It will allow domain.com/webalizer/ for viewing stats without logging in to cPanel
================== ============================
cd /home/username/www
ln -s ../tmp/webalizer webalizer
chown username.username webalizer
cd ../tmp
chmod 755 ./
chmod 755 ./webalizer
================== ============================
It will allow domain.com/webalizer/ for viewing stats without logging in to cPanel