The two main approaches of research are

The two main approaches to research are the qualitative and the quantitative paradigms.

Data collection and data analysis are stages within any research, not the overarching approaches.

Surveys and questionnaires are specific methods and tools, not the two broad paradigms.

Sampling and data collection are procedural steps rather than paradigmatic approaches.

Qualitative work explores meanings in depth, while quantitative work measures and quantifies.

Combining both within one study is known as the mixed-methods approach.