Which is NOT true about the coefficient of determination?
a. As you add more variables, the R-square generally rises.
b. As you add more variables, the adjusted R-square can fall.
c. If the R-square is above 50%, the regression is considered significant.
d. The R-square gives the percent of the variation in the dependent variable that is explained by the independent variables.
e. The higher is the R-square, the better is the fit.
c
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China began pegging its currency, the yuan, to the U.S. dollar in 1994. Because the yuan has been ________ at the pegged exchange rate, the Chinese government ________ its reserves of U.S. dollars as the government purchased more ________ to maintain the pegged exchange rate.
A) undervalued; increased; dollars B) undervalued; decreased; yuan C) overvalued; decreased; yuan D) overvalued; increased; yuan
When the price of a product increases, the marginal revenue product curve in a perfectly competitive market
A) does not change. B) becomes flatter. C) shifts to the right. D) shifts to the left.