Short section discussing topic with motivation, questions/issues of interest, etc.
The design should include details such as…
- experimental units, measurement units, outcomes, etc.
- target of inference: conducting inference for just units in experiment or is there some
population you are generalizing to
- which factors are random and which are fixed
- the actual levels of factors
- the number of observations
- how randomization will be done (e.g., a single randomization, randomization separately
by block, randomization separately by split plots, etc.)
It is not necessary to include a power analysis.
It is important that you design an experiment, not an observational study; make sure that you are
assigning experimental units to treatments and not simply observing them.
Please include an analysis plan. The level of detail I’m looking for may include, for example, a
partial ANOVA table including degrees of freedom, expected mean squares, and hypotheses you
wish to test with statement of appropriate test statistics. An R code fragment for essential parts of
the analysis could be included.
You will not be doing an actual experiment or otherwise collecting data; the assignment is
simply to design a plausible experiment. There should be no actual data or actual analysis in your
paper, just a discussion of how analysis would proceed.
Providing thoughtful details will help enrich your project. You should consider problems
you may realistically run into (e.g., violation of assumptions, possibility of units dropping
out of study, sources of unwanted variation) and explain (at least briefly) how you would
deal with them.
How complex should my design/analysis plan be: You should demonstrate that you have a
thorough understanding of the course material and enough mastery to design your own
experiment. I also want you to include what I call a “level up.” This means at least one piece of
your design or analysis is not something we explicitly covered in class. You only need to do one
level up. For instance, you might…
• …explore a new design and the appropriate analysis method for such a design
Examples: partially balanced incomplete block designs, rerandomization, conjoint
• …or discuss a new analysis method or component
Examples: multiple testing procedure not covered in class, different model for
data, new way to assess assumptions, tests for quantities other than means
• …or consider a problem you may encounter that we have not covered in class and discuss
one strategy for dealing with it in the design and/or analysis stage
Examples: methods to deal with unbalanced data not covered in class, non
compliance, censored data, missing data
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