describe different methods to calculate prejudice by sociologist

Answer 1

You'll find many of our previous answers here.

http://www.jiskha.com/search/index.cgi?query=calculate+prejudice+

Answer 2

http://www.jiskha.com/search/index.cgi?query=calculate+prejudice+by+sociologist+

Skip the first link here, and read the others. You'll find some ideas you may be able to use.