A way to be sure that an observed relationship between an independent variable and a dependent variable does indeed exist is by
a. selecting which individual subjects are to be included in the study.
b. identifying other possible variables.
c. the creation of a control group.
d. surveying the subjects of the study.
Question 2
A college professor, concerned about lack of attention by students during lecture, is considering a study of the effects of room temperature on state of consciousness. If the study is undertaken, what would be the dependent variable?
a. room temperature
b. state of consciousness
c. the length of the class
d. the time of day
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