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Pre-experiments
so weak that they are of almost no value in exploring cause-and-effect relationpships
Dashed lines in experimental designs stand for what
the groups are intact groups, ie. groups that existed prior to the experiment that were not formed for the purpose of the experiment
Baseline
a series of pretests that are given before a treatment is given
In the equivalent time samples design, how should the days for treatment be selected?
Randomly
What is a key problem with the time-series design?
History
An abstract of about how many words is appropriate
150
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