The first large-scale, empirical sociological research in the United States was conducted by W.E.B. Du Bois, and its objective was to ______.
A. observe racism's role in American society.
B. understand the cause of racism in the United States.
C. contest the idea that all white Americans held racist opinions.
D. refute racist beliefs about African Americans.
Answer: D
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White matter hyperintensities (WMH) may indicate
a. extremely high intelligence. b. predisposition to Alzheimer's disease. c. brain pathologies such as neural atrophy. d. emotional pathology.
Researchers say that a correlation is significant if:
A) the dots appear to form a straight line on the scatter diagram B) there is a small probability, such as 5% or 1%, that you could have obtained a correlation this big if in fact there had been no correlation in the population at large C) the correlation is .05 or greater (or below ?.05 if negative) D) there is a large probability (.50 or larger) that this correlation is greater than that computed in standard tables of what is called the chi-square distribution
Suppose we have data on employees who earn an average wage of $22.00 per hour. If the standard deviation of wages is $4.00 per hour, what percentage of workers earn between $19.00 and $25.00?
a. 27 b. 54.6 c. 89.4 d. 90
What is the current retirement age, for those born after 1960, at which one may receive full Social Security benefits in the United States?
A. 70 B. 69 C. 67 D. 65