A simple Plugin to add Analytics code on your pages. You simply enter your ID, you choose if you are on a sub-domain and add your domain name.
I installed this and it worked as described in that it was very minimal, and it inserted the google analytics tracking code in the html head.
However, even after 3 hours Google Analytics was still saying 'Tracking Not Installed'.
I noticed that the tracking code inserted by this plugin is quite different to that given by google analytics.
So I uninstalled the plugin and manually put googles tracking code into my themes header.php. After 10 mins, Google Analytics then picked it up.