Question

In Exercises, state whether the investigation in question is an observational study or a designed experiment. Justify your answer in each case. Starti

Study design
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asked 2021-01-31
In Exercises, state whether the investigation in question is an observational study or a designed experiment. Justify your answer in each case.
Starting Salaries. The National Association of Colleges and Employers (NACE) compiles information on salary offers to new college graduates and publishes the results in Salary Survey.

Answers (1)

2021-02-01
Step 1
Observational study:
The investigators may simply observe a predefined set of individuals and collect the data from the observations, without influencing any factors involved. This is an “observational study”.
Step 2
Designed experiment:
The investigator may design and perform their own experiments my controlling and manipulating factors of their choice and collect the resulting data. This is the “designed experiment”.
The investigators had no influence on the salary offers to the new college graduates. The investigators could simply observe the individuals and form a conclusion from their observations.
Thus, the investigation is an observational study.
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