Multiple Choice
A researcher has conducted an experiment in which she assigned all of her students four hours of homework the night before a test, in order to see what effect the extra stress has on test performance. The study is flawed because the researcher did not include a(n) _____
A) control group.
B) experimental group.
C) independent variable.
D) random sample.
Correct Answer:
Verified
Correct Answer:
Verified
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