Comparing the California test scores to test scores in Massachusetts is appropriate for external validity if

A) Massachusetts also allowed beach walking to be an appropriate P.E. activity.
B) the two income distributions were very similar.
C) the student-to-teacher ratio did not differ by more than five on average.
D) the institutional settings in California and Massachusetts, such as organization in classroom instruction and curriculum, were similar in the two states.


Answer: D

Economics

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Dryden Press can produce 10,000 textbooks using 10 machines and 100 workers or using 5 machines and 300 workers. It can produce 20,000 textbooks using 10 machines and 300 workers or 5 machines and 600 workers. Construct a two-dimensional contour-type graph to show the relationship between the output of textbooks and the labor and machinery inputs.

What will be an ideal response?

Economics

Empirical studies show that countries with low standards are very successful at attracting foreign investment

Indicate whether the statement is true or false

Economics

Fixed costs are fixed with respect to changes in

A) output. B) capital expenditure. C) wages. D) time.

Economics

Which of the following methods did the government adopt in order to keep agricultural prices from falling too low?

a. reliance on free-market equilibrium b. soil bank programs c. land purchase subsidies d. mortgage relief e. price ceilings

Economics