What type of information is primarily used in quantitative investigations?

In quantitative investigations, the primary type of information used is numerical information. This approach focuses on quantifying data and using statistical methods to test hypotheses and analyze data. Quantitative research aims to produce reliable and valid results that can be generalized to a larger population.

This type of research often involves structured tools such as surveys or experiments that yield measurable results, which can be represented as numbers or statistics. By utilizing numerical information, researchers can identify patterns, relationships, and causality among variables, ultimately contributing to a clearer understanding of the phenomena being studied.

Other types of research mentioned, such as phenomenological and ethnographic research, predominantly focus on subjective experiences and qualitative data, which are descriptive and not primarily numerical. Sensory information, while relevant in various contexts, does not encompass the systematic and numeric focus characteristic of quantitative investigations, which is why numerical information is the correct choice.