Dear User,
All DHS Program tables are weighted (unless otherwise noted in the table). You can learn more about weighted tables by reading through the Reading and Understanding Tables from the 2015 Nigeria Malaria Indicator Survey (NMIS) pdf. Please pay close attention to page 4 of the document. https://dhsprogram.com/pubs/pdf/DM93/DM93.pdf

To answer your second question the 2010 Nigeria MIS did not sample at the state level. This means that it is not possible to compare state level data between the 2010 and 2015 MIS. You can read more about the sampling design of both reports in Appendix A in the back of each report.