The linear regression equation, Y = a + bX, was estimated. The following computer printout was obtained: 
Given the above information, the parameter estimate of a indicates
A. when X is zero, Y is 5.09.
B. when Y is zero, X is 8.03.
C. when Y is zero, X is -21.36.
D. when X is zero, Y is 15.48.
Answer: D
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The development of a strain of wheat that will yield two crops per year rather than one crop per year is an example of economic growth resulting from
A) increased gross investment. B) technological progress. C) an increase in per capita real income. D) capital accumulation.
Assume the production of a good gives rise to external benefits. The government may increase efficiency by
A) subsidizing consumption of the good. B) requiring all producers of the good to be licensed. C) taxing production of the good. D) imposing taxes on the good.
If a straight line passes through the point x = 12 and y = 4 and also through the point x = 4 and y = 8, the slope of this line is
A) seven tenths. B) negative 8 divided by 4. C) one -and one half. D) negative one half.
Unlike World War I (1914–18), the war debt of World War II (1941–45) was manageable and did not contribute to inflation
Indicate whether the statement is true or false