1- The Department of Industrial Engineering at a major
university wants to develop an empirical model to predict the
success of its undergraduate students in completing their
(a) What would you use as the response or outcome variable
in this study?
(b) What predictor variables would you recommend using?
(c) Discuss how you would collect data to build this model. Is
this a retrospective study or an observational study?

2- A city has 20 neighborhoods. How could the city tax

appraiser select a random sample of single-family homes that
could be used in developing an empirical model to predict the
appraised value of a house?
(a) What characteristics of the house would you recommend
that the tax appraiser consider using in the model?
(b) Is this an enumerative study or an analytic study?

3- How would you obtain a sample of size 20 from all of
the possible distances that you might throw a baseball? Is the
population that you are sampling from conceptual or physical?

4-List two examples of conceptual populations and

two examples of physical populations. For each population,
describe a question that could be answered by sampling
from the population. Describe how a random sample could
be obtained.

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