test. One group had to check e-mail and respond to instant messages while taking the test, a than the average for the control group. important that the researchers created the two experimental groups in this study by using rand ndom assignment, the researchers cannot make multiple observations for each group. ndom assignment, the researchers can't hold extraneous variables constant. lom assigment ensures the conclusion can be generalized to a larger population. lom assignment produces comparable, unbiased experimental groups. lom assigment allows the researchers to implement blocking for this experiment.
test. One group had to check e-mail and respond to instant messages while taking the test, a than the average for the control group. important that the researchers created the two experimental groups in this study by using rand ndom assignment, the researchers cannot make multiple observations for each group. ndom assignment, the researchers can't hold extraneous variables constant. lom assigment ensures the conclusion can be generalized to a larger population. lom assignment produces comparable, unbiased experimental groups. lom assigment allows the researchers to implement blocking for this experiment.
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
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ISBN:9780079039897
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Chapter4: Equations Of Linear Functions
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Transcribed Image Text:The Institute of Psychiatry at Kings College London found that dealing with infomania (information overload) has a temporary, but significant derogatory effect on IQ.† Researchers divided volunteers into two groups. Each
subject took an IQ test. One group had to check e-mail and respond to instant messages while taking the test, and the second group took the test without any distraction. The distracted group had an average score that was
10 points lower than the average for the control group.
Explain why it is important that the researchers created the two experimental groups in this study by using random assignment.
O Without random assignment, the researchers cannot make multiple observations for each group.
O Without random assignment, the researchers can't hold extraneous variables constant.
O Using random assigment ensures the conclusion can be generalized to a larger population.
O Using random assignment produces comparable, unbiased experimental groups.
O Using random assigment allows the researchers to implement blocking for this experiment.
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