You need to know what a research question is, what its significance is, and what steps are required to get it right.
Find out what a research topic is, what criteria need to be taken into account when selecting it and how to delimit it step by step.
Learn what mean deviation is, how it is commonly used, formulas and examples, and how to calculate it.
The non-experimental research examines variables in their natural environment. Get to know the features of this model.
Learn what the Pearson correlation coefficient is, how to calculate it, and how to interpret this testing method.