What term refers to the arithmetic average of a series of numbers?
a. The mean
b. The mode
c. The median
d. The correlation
Answer: a
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What effect has mobile phone usage had on health care in Africa?
A. It has reduced the accuracy of government health databases. B. It has allowed real-time data on vaccine availability or deficits in clinics to reach suppliers. C. It has allowed residents of remote areas to access on-the-spot diagnostics. D. It has allowed scientists and doctors to predict future health issues.
Increasing the yield per acre comes about through an intensification of agriculture
Indicate whether the statement is true or false
After cremation, the "ashes" are
A. in a sharp and spiky state. B. in pieces like wood or paper pulp. C. in a granular state like coarse coral sand. D. as fine as baby powder.
Which country tops the worldwide student educational performance rankings in math, reading, and science?
A. the U.S. B. Norway C. Singapore D. South Korea