
Concept explainers
a.
Design the given terms.
a.

Answer to Problem 31HP
Survey:
Surveys are one form of an observational study since the researchers do not influence the outcomes. Statistical surveys collect information form a sample group to learn about the entire population. A survey may focus on opinions or factual information depending upon the purpose of study.
Explanation of Solution
Given information:
Survey
Calculation:
Survey:
Surveys are one form of an observational study since the researchers do not influence the outcomes. Statistical surveys collect information form a sample group to learn about the entire population. A survey may focus on opinions or factual information depending upon the purpose of study.
b.
Design the given terms.
b.

Answer to Problem 31HP
Observational study:
In an observational study the sample population being studied is measured or surveyed as it is. The researcher observes the subjects and measures variables, but does not influence the population in any way or attempt to intervene in the study.
Explanation of Solution
Given information:
Observational study,
Calculation:
Observational study:
In an observational study the sample population being studied is measured or surveyed as it is. The researcher observes the subjects and measures variables, but does not influence the population in any way or attempt to intervene in the study.
c.
Design the given terms.
c.

Answer to Problem 31HP
Experiment:
Unlike the observational study an experimental study has the researcher purposely attempting to influence the results. The goal is to determine what effect a particular treatment has on the outcome.
Explanation of Solution
Given information:
Experiment.
Calculation:
Experiment:
Unlike the observational study an experimental study has the researcher purposely attempting to influence the results. The goal is to determine what effect a particular treatment has on the outcome.
Chapter 12 Solutions
Algebra 2
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