The variance of a distribution of means is smaller than the original population variance because
A) it is based on fewer individuals than is the original population.
B) it is an estimate of the sample parameters rather than of the original population.
C) extreme scores are less likely to affect a distribution of means.
D) the mean of a distribution of means is so different than the population mean.
C
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Freud's legacy for developmental science is __________.
A. essentially nonexistent, since his theories have been rejected B. recognizing the lasting effects of early experience C. an emphasis on toilet training D. the four psychosexual stages as the key to development
Hank the hummingbird has been isolated since birth. When he is released into the company of an attractive female hummingbird, he almost immediately begins the courtship ritual. Hank's behavior shows that ____.?
a. ?you can’tdistinguish animal behavior from human behavior b. ?fixed action patterns have a strong learned component c. ?you can’t keep a good hummingbird down d. ?species-specific behaviors are unlearned, inherited patterns
Prior to the 2004 Republican convention in New York, undercover officers infiltrated activist groups that they believed might cause problems during the convention. Officers attended meetings, made friends, signed petitions, and then reported on the groups' activities to supervisors. The operation described in this case can be described as a(n)_____________.
A. informal inquiry B. proactive investigation C. reactive investigation D. pretext investigation
The optic nerve is made up of axons from the
A) photoreceptors B) ganglion cells C)bipolar cells D) fovea