Pollution of surface waters, such as rivers, oceans, streams, and lakes
a. is one of the easiest kinds of pollution to prevent because the waterways are visible to everyone.
b. creates social costs in the form of lost recreational areas, dead and contaminated sea food, lost jobs in the fishing industry, and contamination of drinking water.
c. has declined substantially since 1940 because of the ban on DDT.
d. declined over the decade of the 1980s because of strict enforcement of pollution control laws.
b
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Repetitive-motion disorders are the most common workplace illnesses and result in the longest absences from work
Indicate whether the statement is true or false
To compute a median for scores that have been grouped into a frequency distribution, we assume that the scores in each interval are
a. spaced evenly across the interval. b. located at the upper real limit of the interval. c. located at the lower stated limit of the interval. d. located at the midpoint of the interval.
The United States has 5 percent of the world's population and about __________ of the world's prisoners.
A. 3 percent B. 5 percent C. 13 percent D. 25 percent
The World Bank divides middle-income economies into lower-middle income and upper-middle income. Armenia, Ghana, Guatemala, Honduras, Lesotho, Nigeria, Ukraine, and Vietnam are classified as: a. high-income countries
c. lower-middle-income countries. b. upper-middle-income countries. d. low-income countries.