Professor wong measured the intelligence and temperament of a group of preschoolers. he plans to follow the same group of participants over time and collect similar data when the children are in 3rd grade, 6th grade, and 9th grade. this is an example of which type of research design?

Longitudinal design

Explanation:

A longitudinal study is a type of observational research method in which data is collected for the same participants repeatedly over a given period. It can extend over the years.

Types of Longitudinal research: Cohort study and panel study.

Disadvantages:

1. Require a long duration of time.

2. Data is not a hundred percent reliable.

3. Require a large sample size.

4. Not cost-effective research.

every society, in order to meet the needs of it's people, has to answer three basic questions:

- what should we produce?

- how should we produce it?

- for whom should we produce it?

this questions must be answered in order to, option b, aid in production decisions.

every country can't produce everything, no matter how rich their land is. it may be a matter of technology, resources or geographical conditions. so, these three questions must be resolved in order to get the most of the production of each land.

hope this !

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