A random variable is
a. A variable that takes of values that are uncertain
b. A variable that takes on known values
c. A variable that is always zero
d. A variable that takes on null values only
a
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Between 1960 and 2010, the annual growth rate in percent per year was the highest in
A) China. B) United States. C) Brazil. D) Singapore. E) South Korea.
Before the nation's first transcontinental railroad was completed, travelers to the Pacific Coast used which forms of transportation?
a. ship, wagon b. dugout canoe, dirigible c. horse d. All of the above are correct.
Today, the world is not just experiencing more change or more rapid change, but qualitatively new conditions, particularly a dramatic loss in the ability of states to
a. protect their borders. b. maintain democratic governments. c. control economies. d. wage war.
Public goods are unlikely to be provided by the private sector because
A) the production of the good creates negative externalities. B) no one can be excluded from the consumption of the good. C) the consumption of the good creates negative externalities. D) the exclusion principle does not apply to public goods.