Question

____________investigations provide large amounts of information about a wide range of variables.

Answer 1

Quantitative, as opposed to qualitative investigations provide large amounts of information about a wide range of variables.
Quantitative investigations yield numerous results - they are all about the quantity, or large number of results, whereas qualitative are more about the quality.

Answer 2

The correct answer is:

Qualitative

Quantitative investigations are formal, objective and systematic process where numerical data is obtained and its result is mainly deductive. Normally quantitative investigations are directioned to a reduced set of variables in order to try to obtain explanations of the independent variable, whereas in qualitative investigations the investigator collects a large amount of information about a large range of variables in order to try to elucidate relations about multifactorial facts.