When we say that a correlation coefficient is statistically significant, we mean that
a. we have reason to believe that it reflects an important relationship between variables.
b. we have reason to believe that the relationship is positive.
c. we have reason to believe that the true correlation in the population is not 0.0.
d. we have strong support for a causal statement about the relationship.
C
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Which of the following is most characteristic of crack cocaine? a. It attaches equally to all types of receptors within the brain. b. It is often prescribed for its medical benefits
c. It produces its effects on the brain within seconds. d. It affects the brain by the same mechanism that alcohol does.
Recent research on the "Big Five" personality factors uses an approach to understanding personality similar to that advocated by
A. Gordon Allport. B. Raymond Cattell. C. Carl Jung. D. Henry Murray.
Which of the following types of drugs is most likely to produce symptoms of synesthesia, the blending of perceptions from different sensory receptors?
a. LSD b. alcohol c. amphetamine d. cocaine
________ are the photoreceptors that allow us to see black and white; ______ are the photoreceptors that allow us to see colors
a. Cones; rods c. Ganglion cells; bipolar cells b. Rods; cones d. Bipolar cells; ganglion cells