Dr Taylor Is Conducting a Study to Test the Effect

Multiple Choice

Dr. Taylor is conducting a study to test the effect of a new drug on people's ability to concentrate at work. His research sample consists of 100 US adults. During a 14-week period, half of the sample is administered the drug and the other half is administered a placebo, and participants' concentration abilities are continually tracked. In the context of this study, if Dr. Taylor uses random assignment, it means that ____.

A) his study will be high in external validity
B) the 100 adults are likely to be representative of the larger population of interest
C) each adult has an equal chance of being administered  either the drug or the placebo
D) his research findings are likely to be statistically significant