Step Three: Create a research question or hypotheses
This should be 1) based on the literature; 2) contain the specific variables you want to explore; and 3) be testable/measureable.
In general a hypothesis will predict what you think you will find and is a stronger test of your ideas. A research question is posed when we don't have enough information to make an argument about what the results will likely be.
For instance,
RQ: Does increasing the number of teacher immediacy behaviors increase student engagement?
H: The number of teacher immediacy behaviors will be significantly and positively correlated with student engagement.
Cresswell, J.R. (2013). Research Design: Qualitative, Quantitative and Mixed Methods Approaches. 4th edition. Thousand Oaks, CA: Sage.
Chapter 7: Research Questions and Hypotheses: http://www.sagepub.com/upm-data/22782_Chapter_7.pdf
Cresswell examples in articles: http://www.sagepub.com/creswellstudy/07/pdfarticles.htm
Trader, R. (2013). Handout for Quantitative Research Methods at McDaniel College – concise definition of RQ vs. H