What do we mean by an unbiased statistic?
a. a statistic that equals the sample mean
b. a statistic whose average is very stable from sample to sample
c. a statistic used to measure racial diversity
d. a statistic whose long range average is equal to the parameter it estimates
D
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Compared to young adults, aging humans with poor working memory have ____ activity in the prefrontal cortex and aging humans with intact working memory have ____ activity in the prefrontal cortex
a. decreased; decreased b. increased; increased c. increased; decreased d. decreased; increased
The HPV virus has immediate and fatal consequences
Indicate whether this statement is true or false.
A rat is placed in a radial maze in which it has already been trained for many trials. As compared to rats without damage to their hippocampus, rats with damage are more likely to ____.
A. enter an alley at random B. fail to eat the food they find C. enter one of the correct alleys repeatedly D. enter an alley that is never correct
In the United States, which of the following ethnic groups has the highest rates of adolescent pregnancy?
A. African American adolescents B. Latina adolescents C. non-Latina White adolescents D. Asian American adolescents