by Grant Norwood on WordPress.org
A well-designed plugin that improves the accuracy of your bounce rate, time on page, and session duration metrics in Google Analytics.

Screen shot of the options page.
Google Analytics does not properly track some important engagement metrics like Avg Session Duration, Avg Session Duration, and Bounce Rate. This plugin uses a commonly-accepted JavaScript method of improving the accuracy of these stats.
This plugin addresses the issues as identified by the Google Analytics team at:
Others have also blogged about their own solutions at:
See http://grantnorwood.com/wordpress/plugins/adjusted-bounce-rate/ for more information about the plugin and the author, or visit the GitHub repo at https://github.com/grantnorwood/adjusted-bounce-rate to fork my code or submit an issue.