How might you describe this hypothesized interaction effect?
A. A cell phone ringing during a lecture will lead to more errors on an exam, especially for those students who have symptoms of attention deficit hyperactivity disorder (ADHD).
B. A ringing cell phone will lead to more errors on an exam but that those with low levels of ADHD will be unaffected.
C. Those who experience a ringing cell phone during a lecture and have ADHD will make the most errors on the exam.
D. Those who experience a ringing cell phone during a lecture will make the most errors on the exam.
Ans: A
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In conducting an experiment, why would the researcher use random selection and random assignment? Include a definition for each
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