The ___________________ for a currency is how much of one country's money can be bought with a specified amount of another country's currency

Three classes of student exam scores are compiled. Using SPSS to explore the data provided, determine the following:

a. Consider the post hoc contrasts between the different groups. Do any groups stand out?
b. Using the results from part (a), test the hypothesis that mean test score of one group differs from those of the other two.

The U.S. Environmental Protection Agency (EPA) uses _____ to determine the level of chemicals and other pollutants that can be present in water and still be considered safe to drink.

A. contingent valuation methods B. sensitivity analysis C. risk evaluation D. impact assessment