If you are using one of my themes it is built on the Genesis platform which makes it very easy to add code or script! Simply click on Genesis – Theme Settings and you will see two boxes. WP_Head and WP_Foot. Placing codes here eliminates the need to go into your theme’s core files.
wp_head() hook executes immediately before the closing
wp_footer() hook executes immediately before the closing
If you’re installing Google Analytics you will want to paste the script into the WP_Head box. Note that it can take up to 24hrs to register with GA