It could be useful to know about undocumented workers and how they live, but such people are reluctant to participate in anything they think might be associated with the government. These immigrants constitute a
a. sampling frame.
b. chronically inaccessible, self-selected sample.
c. hidden population.
d. a nondifferentiated sample.
C
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Cosmo is convinced that his accountant is addicted to drugs. To determine whether he is correct, Cosmo asks his friends if the accountant sniffs a lot, uses slang when he speaks, or frequently excuses himself to use the men's room—three behaviors Cosmo believes are characteristic of those with drug addictions. Cosmo's methods illustrate
a. the false-consensus effect. b. a self-fulfilling prophecy. c. confirmatory hypothesis testing. d. the trait negativity bias.
In this computation, Population mean = 
you are adding up the ______.
A. ?, n B. ? C. N's D. X's
Research has indicated that there is a _____ between temperature and instances of aggression during professional baseball games.
A) positive correlation B) negative correlation C) direct causal relationship D) causal and inverse relationship
According to Allison and Cichetti, which of the following animals would tend to sleep the most?
a. lions b. cows c. human beings d. horses