If two bell-shaped curves have no overlap and their average scores are very far apart, this means what is large?
A. standard deviation
B. correlation
C. coefficient
D. t-test
Answer: D
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Which technique ensures that personal characteristics that might affect the outcome of an experiment are scattered among research participants in the different groups, thereby making the groups roughly equivalent?
A. dependent recursion B. random assignment C. independent assignment D. regression to the mean
For a data set with an odd number of scores, the median is simply the most frequently occurring score.
Answer the following statement true (T) or false (F)
Urvashi decides to help her friend find her lost cat because her friend is likely to give her a reward. This is an example of a. prosocial behavior
b. altruism. c. empathy. d. simple social play.
Although other neurotransmitters are present, the brain's reward or "pleasure" system has a predominance of which neurotransmitter?
a. norepinephrine b. acetylcholine c. histamine d. dopamine