New stores probably need google analytic code to be integrated in header section of the website so it could be loaded with each and every page of website.
Most users will find it hard to integrate Google Analytic code with magento but in fact that is a very easy job.
Let me explain how to do it.
Go to System > Configuration > Design
In design tab look for “HTML Head” section and then look for “Miscellaneous Scripts” as outlined in picture below
Paste your google analytic code into “Miscellaneous Scripts” box and hit “Save Config” Button appearing on top.