The following websites provide various statistical data about Pacific islands.
Here are additional sources that contain statistical information about religion. Some are freely available while others are licensed resources.
When working with statistics, aggregate data, and microdata, it is important to consider a number of factors:
The UCLA Data Archive's Tutorials provides excellent information about working with social science data, citing data sources, how to read codebooks, etc.
Visit the ATS Statistical Computing website for tutorials, online statistical publications, consulting, etc.