What does a properly written research question include?A reference listThe applicable variable(s) and the populationA designed front pageThe author of the researchI don't knowSubmit

A properly written research question should include the applicable variable(s) and the population. These are the key components that guide the research. The variable refers to the aspect that is being studied or manipulated in the research, while the population refers to the group of individuals that the research is focused on.

A reference list and a designed front page are not typically part of the research question itself, but they are important components of the overall research paper or project. The author of the research is also not usually included in the research question, but is important for attributing the work.

"I don't know" is not a valid part of a research question. It's important to have a clear understanding of what you're researching before you formulate your research question.