Imagine that researchers have found a positive correlation between the frequency of disagreements that couples have and how long they stay together
Based on this correlation, would you start arguments with your significant other in order to sustain your relationship?
a. Yes, because the correlation is positive.
b. No, because the correlation is positive.
c. No, because although the two may be correlated, causation has not been established.
d. No, because in your group of friends, the correlation is negative.
Answer: C
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In one experiment, the caloric intake of mice was reduced from free-feeding levels by up to 25, 55, or 65%. The benefits of the caloric restriction were greatest in the 65% group. These benefits included
A) an increased life span. B) a reduced incidence of cancer. C) improved immune responses. D) all of the above E) none of the above
In a study on the effects of sleep on driving performance, sleep would be the a. control group
b. independent variable. c. experimental group. d. dependent variable.