In 2011, the poverty line was ________ for a family of four
A) $15,997
B) $16,958
C) $22,350
D) $20,205
C
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William J. Wilson suggests that:
a. American racism is worse than ever. b. Institutional racism is largely irrelevant. c. Segregated neighborhoods are disappearing. d. Inner city youths develop cultural values that are counter-productive.
When testing for the significance of the difference between two sample means, which of the following is almost always unknown?
a. The population standard deviations b. The sample standard deviations c. Degrees of freedom d. The sample means
Current estimates suggest that _______ people could be fed at the current American diet on a sustainable basis
a. less than 7 billion b. 8–11 billion c. 20–25 billion d. more than 25 billion
If a sample consists of 45 people, the number of degrees of freedom used in the formula to estimate the population variance would be
A) 452. B) 45/2. C) 44. D) .22.