Although a research study is typically conducted with a relatively small group of participants known as a , most researchers hope to generalize their results to a much larger group known as a .

Although a research study is typically conducted with a relatively small group of participants known as a sample, most researchers hope to generalize their results to a much larger group known as a population

Explanation:

A sample, in the field of statistics or quantitative studies, refers to a set of manageable smaller number of objects, persons, or creatures, drawn from a larger group or population using specified criteria. A sample are useful for statistical analysis of a population that has too many individuals and so cannot be easily managed

A population is the sum total of all individuals, objects, creatures, events  cases, etc. It is the group of creatures, events, objects, and items of interest in a study or experiment.

b) trade is easy because of the direct line between their major ports. bilateral trade reached 89,6 thousand million.