Final answer:
Investigators can collect quantitative data from surveys, censuses, and demographic registries, which provide numeric, statistically analyzable data. Qualitative data can be collected through in-depth interviews, focus groups, and content analysis to understand the cultural and social aspects of a population.
Step-by-step explanation:
For quantitative and qualitative data about a population, you can investigate a variety of sources. Quantitative data can be represented by numerical information that can be counted and analyzed for patterns and trends. It is commonly collected through methods such as surveys, census data, and social statistics. Examples include demographic characteristics like age, sex, and education, often available from governmental registries and the census.
Qualitative data seeks to understand human behavior by learning about it through methods like in-depth interviews, focus groups, and analysis of content sources such as books and media. This type of data might provide insights into social and cultural factors, such as why certain populations might engage in specific behaviors or cultural practices.
Both types of data are crucial in answering scientific questions about the interaction of populations within communities. Researchers must justify the selection of data needed, whether it be the statistical analysis provided by quantitative methods or the descriptive, explanatory details offered through qualitative approaches.