A great place to start is with this list of statistical resources put together by the UWM libraries.
Here are some useful search strategies for finding the data and statistics you need for your research:
Make use of existing search guides
Look for data producers
Search the published literature
Use online sources
Ask for help
Search data sources from government and research organizations.
Tip: When searching the WISEdash Public Porta use the Grade Group and Group by features to search for specific data sets categorized by race/ethnicity or other desired data sets.