Wikipedia Style Rate This Page Plugin - a plugin which allows registered user and visitor to rate an article posts or pages.
On plugin settings page go to "Configuration" Tab and look for "Theme Selection" dropdown menu and you can select your desired UI color.
You need to specify the insertion type of the plugin if either "By Category" and "By Page" but you need to specify the category and page you want the plugin to display with on its specific Insertion Tab. You can also set the insertion into "By Page and Category" or set it to "All Article" to display the plugin on all article post except on pages.
On that tab you can uninstall and re-install the plugin's own table that stores the data of rated post if you don't want to go on phpMyAdmin to delete manually all the data.
The plug-in Average Rating formula: If there are (5) people voted for trustworthy and rated 5.0, then the average rating is 5.0 because, the article's trustworthy is weighted by the number of people's ratings. Now, if there are (5) people voted for trustworthy that rated 5.0, and another one person voted 1.0 rating, then the average rating is 4.3.
In short: Total number of rating's Trustworthy, Objective, Complete and Well-written (of certain article post) is divided by the number of people who rated the article = Average Rating.
Highest and Lowest Rated posts/pages will be intentified if the average is 3.5 above and 3.5 below.
Use [rate_this_page] syntax if you want to use shortcode for the plugin.
Go to Appearance->Widgets and drag the widget named "RTP Top Rated" into sidebar panel. That's it it and you're done.