Identify the true statements about quantitative research methods.
Multiple select question.
O They are most often used with descriptive and causal research designs.
O Research problems are precise and well defined.
O Their unstructured approach enables researchers to collect in-depth data about respondents' attitudes, beliefs, and emotions.
O They are often statistically projectible to the target population of interest.
O Researchers usually collect detailed data from relatively small samples by observing behavior.